The Experts below are selected from a list of 81489 Experts worldwide ranked by ideXlab platform
Maximilian S. Nickolsky - One of the best experts on this subject based on the ideXlab platform.
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on the carrier phase of the planetary noble gases tem raman and stepped Combustion Data for acid resistant residues from the saratov l4 meteorite
Meteoritics & Planetary Science, 2018Co-Authors: A. V. Fisenko, A. B. Verchovsky, Andrei A. Shiryaev, Luba F. Semjonova, Alexey A. Averin, A Vasiliev, Maximilian S. NickolskyAbstract:Acid‐resistant residues (ARR) were separated from the Saratov (L4) meteorite with the aim to shed more light on the origin of the planetary noble gases (the Q‐gases) in meteorites and the nature of their carrier phase (Q‐phase). Eleven fractions were obtained by HCl and HCl+HF etching, ultrasonication, and subsequent density separation of the ARR in isopropanol and isopropanol+NaOH. Two aliquots of the fractions were also treated with H2O2 and HNO3 to investigate any influence of the oxidizing agent on the Q‐gases retention. The separated ARR fractions have been analyzed for C, N, and noble gases using step Combustion. Raman and TEM analyses of the carbonaceous phase structures have also been applied for some of the fractions. This appears to be one of the most detailed investigations of the ARR fractions so far. The important observation made for the ARR fraction studied by TEM is the presence of abundant curved graphene stacks with a variable number of layers. Significant amounts of single‐ and bilayer graphenes and nanosized chromite grains partly covered with graphene layers are also observed. The principal features of the Q noble gases in the studied ARR fractions are the following. (1) Elemental composition of the Q‐gases depends on the extraction protocol. The most interesting is that upon H2O2 oxidation, the noble gases are retained in the sequence Xe
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On the carrier phase of the “planetary” noble gases: TEM, Raman, and stepped Combustion Data for acid‐resistant residues from the Saratov (L4) meteorite
Meteoritics & Planetary Science, 2018Co-Authors: A. V. Fisenko, A. B. Verchovsky, Andrei A. Shiryaev, Luba F. Semjonova, Alexey A. Averin, A. L. Vasiliev, Maximilian S. NickolskyAbstract:Acid‐resistant residues (ARR) were separated from the Saratov (L4) meteorite with the aim to shed more light on the origin of the planetary noble gases (the Q‐gases) in meteorites and the nature of their carrier phase (Q‐phase). Eleven fractions were obtained by HCl and HCl+HF etching, ultrasonication, and subsequent density separation of the ARR in isopropanol and isopropanol+NaOH. Two aliquots of the fractions were also treated with H2O2 and HNO3 to investigate any influence of the oxidizing agent on the Q‐gases retention. The separated ARR fractions have been analyzed for C, N, and noble gases using step Combustion. Raman and TEM analyses of the carbonaceous phase structures have also been applied for some of the fractions. This appears to be one of the most detailed investigations of the ARR fractions so far. The important observation made for the ARR fraction studied by TEM is the presence of abundant curved graphene stacks with a variable number of layers. Significant amounts of single‐ and bilayer graphenes and nanosized chromite grains partly covered with graphene layers are also observed. The principal features of the Q noble gases in the studied ARR fractions are the following. (1) Elemental composition of the Q‐gases depends on the extraction protocol. The most interesting is that upon H2O2 oxidation, the noble gases are retained in the sequence Xe
M. Vangsness - One of the best experts on this subject based on the ideXlab platform.
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Combustion and Heat Transfer; Volume 4 - Combustion Data Sets
1997Co-Authors: D. R. Ballal, F. Takahashi, W. J. Schmoll, M. Vangsness, R. StriebichAbstract:Abstract : The objective of the proposed research was to develop a fundamental understanding of the Combustion process in a gas turbine combustor. Specifically, we performed WSR experiments, vortex-flame interaction studies, flame stabilization research, and studies of turbine blade film cooling. In this report, we present the Combustion Data Sets that may be used by modelers in the industry and elsewhere for evaluating and refining computer models. More exhaustive information is available in the individual papers and reports listed here. All Data sets were prepared using Microsoft Office 97 for IBM PC-compatible computers and are available on computer diskettes.
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Combustion and heat transfer: Volume 4 -- Combustion Data sets. Final report, 8 June 1992--31 December 1997
1997Co-Authors: D. R. Ballal, F. Takahashi, W. J. Schmoll, D. Pestian, M. VangsnessAbstract:The objective of the proposed research was to develop a fundamental understanding of the Combustion process in a gas turbine combustor. Specifically, the authors performed WSR experiments, vortex-flame interaction studies, flame stabilization research, and studies of turbine blade film cooling. A toroidal WSR was used to study lean blowout (LBO), Combustion efficiency, and emissions. They found that fuel hydrocarbons of different structure and (C/H) ratio produced a noticeable influence on the Combustion and emissions performance of a gas turbine combustor. In the vortex-flame interaction, the extinction caused by internal vortex is primarily due to the unsteady transport effects on chemical kinetics and extinction due to external vortex is caused due to excess convective influx into the strained flame. The authors studied the structure and stability (especially LBO) of a turbulent swirling flame in a variety of model combustors and found that swirl promotes turbulence and creates a positive radial velocity component that increases flame spread and turbulent mixing. The computations predicted the attached flame locations, the development of a strong inner recirculation zone, the flame lift-off height, the location of reattachment point of the recirculation bubble. In the research on turbine blade cooling, PIV measurements showed an almost doubling ofmore » the jet spread for an increase in free stream turbulence from 1% to 17%. and forcing of the film cooling flow resulted in a decrease in film cooling effectiveness by as much as 70%.« less
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Combustion and Heat Transfer Studies Utilizing Advanced Diagnostics: Combustion Data Sets
1992Co-Authors: D. R. Ballal, F. Takahashi, W. J. Schmoll, S. P. Heneghan, M. VangsnessAbstract:Abstract : A long-term goal of the Air Force is to develop near-stoichiometric gas turbine combustors that will burn broad-specification fuels, and have low maintenance and high durability. Towards meeting this goal, this program had two principal objectives: to design and conduct experiments that will establish a fundamental understanding of lean blowout (LBO), swirling flames, kinetically controlled Combustion, and turbine blade cooling, and to provide Data sets for evaluating and refining computer models of gas turbine combustor. In this final report, we present the (Combustion Data Sets that may be used by modelers in the industry and other laboratories for evaluating and refining computer models of gas turbine combustor. These Data sets are for three different technical tasks; Step Combustor Task, Bluff Body Combustor Task, and Swirl Combustor Task. More exhaustive information is available in the individual papers listed in this report. All the Data sets were prepared using Microsoft Excel V.4.0 for IBM PC- Compatible computers and are available on computer diskettes.... Turbulent Combustion modeling, Dump combustor, Swirling flames, Bluff body Combustion.
A. V. Fisenko - One of the best experts on this subject based on the ideXlab platform.
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on the carrier phase of the planetary noble gases tem raman and stepped Combustion Data for acid resistant residues from the saratov l4 meteorite
Meteoritics & Planetary Science, 2018Co-Authors: A. V. Fisenko, A. B. Verchovsky, Andrei A. Shiryaev, Luba F. Semjonova, Alexey A. Averin, A Vasiliev, Maximilian S. NickolskyAbstract:Acid‐resistant residues (ARR) were separated from the Saratov (L4) meteorite with the aim to shed more light on the origin of the planetary noble gases (the Q‐gases) in meteorites and the nature of their carrier phase (Q‐phase). Eleven fractions were obtained by HCl and HCl+HF etching, ultrasonication, and subsequent density separation of the ARR in isopropanol and isopropanol+NaOH. Two aliquots of the fractions were also treated with H2O2 and HNO3 to investigate any influence of the oxidizing agent on the Q‐gases retention. The separated ARR fractions have been analyzed for C, N, and noble gases using step Combustion. Raman and TEM analyses of the carbonaceous phase structures have also been applied for some of the fractions. This appears to be one of the most detailed investigations of the ARR fractions so far. The important observation made for the ARR fraction studied by TEM is the presence of abundant curved graphene stacks with a variable number of layers. Significant amounts of single‐ and bilayer graphenes and nanosized chromite grains partly covered with graphene layers are also observed. The principal features of the Q noble gases in the studied ARR fractions are the following. (1) Elemental composition of the Q‐gases depends on the extraction protocol. The most interesting is that upon H2O2 oxidation, the noble gases are retained in the sequence Xe
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On the carrier phase of the “planetary” noble gases: TEM, Raman, and stepped Combustion Data for acid‐resistant residues from the Saratov (L4) meteorite
Meteoritics & Planetary Science, 2018Co-Authors: A. V. Fisenko, A. B. Verchovsky, Andrei A. Shiryaev, Luba F. Semjonova, Alexey A. Averin, A. L. Vasiliev, Maximilian S. NickolskyAbstract:Acid‐resistant residues (ARR) were separated from the Saratov (L4) meteorite with the aim to shed more light on the origin of the planetary noble gases (the Q‐gases) in meteorites and the nature of their carrier phase (Q‐phase). Eleven fractions were obtained by HCl and HCl+HF etching, ultrasonication, and subsequent density separation of the ARR in isopropanol and isopropanol+NaOH. Two aliquots of the fractions were also treated with H2O2 and HNO3 to investigate any influence of the oxidizing agent on the Q‐gases retention. The separated ARR fractions have been analyzed for C, N, and noble gases using step Combustion. Raman and TEM analyses of the carbonaceous phase structures have also been applied for some of the fractions. This appears to be one of the most detailed investigations of the ARR fractions so far. The important observation made for the ARR fraction studied by TEM is the presence of abundant curved graphene stacks with a variable number of layers. Significant amounts of single‐ and bilayer graphenes and nanosized chromite grains partly covered with graphene layers are also observed. The principal features of the Q noble gases in the studied ARR fractions are the following. (1) Elemental composition of the Q‐gases depends on the extraction protocol. The most interesting is that upon H2O2 oxidation, the noble gases are retained in the sequence Xe
D. R. Ballal - One of the best experts on this subject based on the ideXlab platform.
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Combustion and Heat Transfer; Volume 4 - Combustion Data Sets
1997Co-Authors: D. R. Ballal, F. Takahashi, W. J. Schmoll, M. Vangsness, R. StriebichAbstract:Abstract : The objective of the proposed research was to develop a fundamental understanding of the Combustion process in a gas turbine combustor. Specifically, we performed WSR experiments, vortex-flame interaction studies, flame stabilization research, and studies of turbine blade film cooling. In this report, we present the Combustion Data Sets that may be used by modelers in the industry and elsewhere for evaluating and refining computer models. More exhaustive information is available in the individual papers and reports listed here. All Data sets were prepared using Microsoft Office 97 for IBM PC-compatible computers and are available on computer diskettes.
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Combustion and heat transfer: Volume 4 -- Combustion Data sets. Final report, 8 June 1992--31 December 1997
1997Co-Authors: D. R. Ballal, F. Takahashi, W. J. Schmoll, D. Pestian, M. VangsnessAbstract:The objective of the proposed research was to develop a fundamental understanding of the Combustion process in a gas turbine combustor. Specifically, the authors performed WSR experiments, vortex-flame interaction studies, flame stabilization research, and studies of turbine blade film cooling. A toroidal WSR was used to study lean blowout (LBO), Combustion efficiency, and emissions. They found that fuel hydrocarbons of different structure and (C/H) ratio produced a noticeable influence on the Combustion and emissions performance of a gas turbine combustor. In the vortex-flame interaction, the extinction caused by internal vortex is primarily due to the unsteady transport effects on chemical kinetics and extinction due to external vortex is caused due to excess convective influx into the strained flame. The authors studied the structure and stability (especially LBO) of a turbulent swirling flame in a variety of model combustors and found that swirl promotes turbulence and creates a positive radial velocity component that increases flame spread and turbulent mixing. The computations predicted the attached flame locations, the development of a strong inner recirculation zone, the flame lift-off height, the location of reattachment point of the recirculation bubble. In the research on turbine blade cooling, PIV measurements showed an almost doubling ofmore » the jet spread for an increase in free stream turbulence from 1% to 17%. and forcing of the film cooling flow resulted in a decrease in film cooling effectiveness by as much as 70%.« less
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Combustion and Heat Transfer Studies Utilizing Advanced Diagnostics: Combustion Data Sets
1992Co-Authors: D. R. Ballal, F. Takahashi, W. J. Schmoll, S. P. Heneghan, M. VangsnessAbstract:Abstract : A long-term goal of the Air Force is to develop near-stoichiometric gas turbine combustors that will burn broad-specification fuels, and have low maintenance and high durability. Towards meeting this goal, this program had two principal objectives: to design and conduct experiments that will establish a fundamental understanding of lean blowout (LBO), swirling flames, kinetically controlled Combustion, and turbine blade cooling, and to provide Data sets for evaluating and refining computer models of gas turbine combustor. In this final report, we present the (Combustion Data Sets that may be used by modelers in the industry and other laboratories for evaluating and refining computer models of gas turbine combustor. These Data sets are for three different technical tasks; Step Combustor Task, Bluff Body Combustor Task, and Swirl Combustor Task. More exhaustive information is available in the individual papers listed in this report. All the Data sets were prepared using Microsoft Excel V.4.0 for IBM PC- Compatible computers and are available on computer diskettes.... Turbulent Combustion modeling, Dump combustor, Swirling flames, Bluff body Combustion.
Yang Zhang - One of the best experts on this subject based on the ideXlab platform.
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ICNSC - Combined Support Vector Novelty Detection for Multi-channel Combustion Data
2007 IEEE International Conference on Networking Sensing and Control, 2007Co-Authors: Lei Clifton, Hujun Yin, David A. Clifton, Yang ZhangAbstract:Multi-channel Combustion Data, consisting of gas pressure and two Combustion chamber luminosity measurements, are investigated in the prediction of Combustion instability. Wavelet analysis is used for feature extraction. A SVM approach is applied for novelty detection and the construction of a model of normal system operation. Novelty scores generated by classifiers from different channels are combined to give a final decision of Data novelty. We compare four novelty score combination mechanisms, and illustrate their complementary relationship in assessing Data novelty.
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support vector machine in novelty detection for multi channel Combustion Data
International Symposium on Neural Networks, 2006Co-Authors: Lei Clifton, Hujun Yin, Yang ZhangAbstract:Multi-channel Combustion Data, consisting of gas pressure and two Combustion chamber luminosity measurements, are investigated in the prediction of Combustion instability. Wavelet analysis is used for feature extraction. A SVM approach is applied for novelty detection and the construction of a model of normal system operation. Novelty scores generated by classifiers from different channels are combined to give a final decision of Data novelty. Comparisons between the proposed SVM method and a GMM approach show that earlier identification of Combustion instability, and greater distinction between stable and unstable Data classes, are achieved with the proposed SVM approach.
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ISNN (2) - Support vector machine in novelty detection for multi-channel Combustion Data
Advances in Neural Networks - ISNN 2006, 2006Co-Authors: Lei Clifton, Hujun Yin, Yang ZhangAbstract:Multi-channel Combustion Data, consisting of gas pressure and two Combustion chamber luminosity measurements, are investigated in the prediction of Combustion instability. Wavelet analysis is used for feature extraction. A SVM approach is applied for novelty detection and the construction of a model of normal system operation. Novelty scores generated by classifiers from different channels are combined to give a final decision of Data novelty. Comparisons between the proposed SVM method and a GMM approach show that earlier identification of Combustion instability, and greater distinction between stable and unstable Data classes, are achieved with the proposed SVM approach.