The Experts below are selected from a list of 15348 Experts worldwide ranked by ideXlab platform
Jingkun Jiang - One of the best experts on this subject based on the ideXlab platform.
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theoretical and experimental analysis of the core Sampling method reducing diffusional losses in Aerosol Sampling line
Aerosol Science and Technology, 2019Co-Authors: Yueyun Fu, Juha Kangasluoma, Jingkun JiangAbstract:AbstractCore Sampling method (extracting a portion of a flow from the core of the flow) will reduce diffusional losses of highly diffusive species (e.g., Aerosol nanoparticles, ions, and gases) when transporting them through a Sampling tube. Revealing parameters governing the Sampling efficiency of a core Sampling system, ηsam, helps to design the apparatus and to optimize its performance. In this study, we report an analytical solution for quantifying the ηsam by solving the convection diffusion equation of laminar flow field. The analytical results were experimentally evaluated using 1–5 nm tungsten oxide nanoparticles. ηsam is governed by a dimensionless loss parameter and the transport-to-sample flow ratio. Theoretically predicted values for ηsam agree with experimental results, e.g., the relative deviation is within 5% when the value for the loss parameter is less than 0.1. The core Sampling method is recommended to work at the loss parameter less than 0.1 such that ηsam is equal or close to the maxi...
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theoretical and experimental analysis of the core Sampling method reducing diffusional losses in Aerosol Sampling line
Aerosol Science and Technology, 2019Co-Authors: Mo Xue, Juha Kangasluoma, Runlong Cai, Jingkun JiangAbstract:Core Sampling method (extracting a portion of a flow from the core of the flow) will reduce diffusional losses of highly diffusive species (e.g., Aerosol nanoparticles, ions, and gases) when transp...
Juha Kangasluoma - One of the best experts on this subject based on the ideXlab platform.
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theoretical and experimental analysis of the core Sampling method reducing diffusional losses in Aerosol Sampling line
Aerosol Science and Technology, 2019Co-Authors: Yueyun Fu, Juha Kangasluoma, Jingkun JiangAbstract:AbstractCore Sampling method (extracting a portion of a flow from the core of the flow) will reduce diffusional losses of highly diffusive species (e.g., Aerosol nanoparticles, ions, and gases) when transporting them through a Sampling tube. Revealing parameters governing the Sampling efficiency of a core Sampling system, ηsam, helps to design the apparatus and to optimize its performance. In this study, we report an analytical solution for quantifying the ηsam by solving the convection diffusion equation of laminar flow field. The analytical results were experimentally evaluated using 1–5 nm tungsten oxide nanoparticles. ηsam is governed by a dimensionless loss parameter and the transport-to-sample flow ratio. Theoretically predicted values for ηsam agree with experimental results, e.g., the relative deviation is within 5% when the value for the loss parameter is less than 0.1. The core Sampling method is recommended to work at the loss parameter less than 0.1 such that ηsam is equal or close to the maxi...
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theoretical and experimental analysis of the core Sampling method reducing diffusional losses in Aerosol Sampling line
Aerosol Science and Technology, 2019Co-Authors: Mo Xue, Juha Kangasluoma, Runlong Cai, Jingkun JiangAbstract:Core Sampling method (extracting a portion of a flow from the core of the flow) will reduce diffusional losses of highly diffusive species (e.g., Aerosol nanoparticles, ions, and gases) when transp...
Mo Xue - One of the best experts on this subject based on the ideXlab platform.
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theoretical and experimental analysis of the core Sampling method reducing diffusional losses in Aerosol Sampling line
Aerosol Science and Technology, 2019Co-Authors: Mo Xue, Juha Kangasluoma, Runlong Cai, Jingkun JiangAbstract:Core Sampling method (extracting a portion of a flow from the core of the flow) will reduce diffusional losses of highly diffusive species (e.g., Aerosol nanoparticles, ions, and gases) when transp...
Yueyun Fu - One of the best experts on this subject based on the ideXlab platform.
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theoretical and experimental analysis of the core Sampling method reducing diffusional losses in Aerosol Sampling line
Aerosol Science and Technology, 2019Co-Authors: Yueyun Fu, Juha Kangasluoma, Jingkun JiangAbstract:AbstractCore Sampling method (extracting a portion of a flow from the core of the flow) will reduce diffusional losses of highly diffusive species (e.g., Aerosol nanoparticles, ions, and gases) when transporting them through a Sampling tube. Revealing parameters governing the Sampling efficiency of a core Sampling system, ηsam, helps to design the apparatus and to optimize its performance. In this study, we report an analytical solution for quantifying the ηsam by solving the convection diffusion equation of laminar flow field. The analytical results were experimentally evaluated using 1–5 nm tungsten oxide nanoparticles. ηsam is governed by a dimensionless loss parameter and the transport-to-sample flow ratio. Theoretically predicted values for ηsam agree with experimental results, e.g., the relative deviation is within 5% when the value for the loss parameter is less than 0.1. The core Sampling method is recommended to work at the loss parameter less than 0.1 such that ηsam is equal or close to the maxi...
Bao Qing Wang - One of the best experts on this subject based on the ideXlab platform.
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Simulation of Transmission Efficiency for Different Bending Radius of Aerosol Sampling Inlet
Applied Mechanics and Materials, 2014Co-Authors: Bao Qing Wang, Shu Yao, Rong Hui Chen, Ze Bei Wang, Shuai YinAbstract:The purpose of the paper is to simulate transmission efficiency for different bending radius of Aerosol Sampling inlet using CFD. To evaluate the transmission efficiency, we introduced Discrete Phase Model to simulate Aerosol movement. Results from simulations show that the greater transmission efficiency Aerosol Sampling inlet will be, the larger bending radius is. At 300mm bending radius, Aerosol transmission efficiency is almost 1 for 10μm diameter of particular matter. The CFD model can effectively simulate the characteristic and loss of Aerosol particulate matters through the bending tube.
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CFD Analysis of Shrouded Diameter in Aerosol Sampling Inlet
Applied Mechanics and Materials, 2013Co-Authors: Bao Qing Wang, Rong Hui Chen, Ze Bei Wang, Shu YaoAbstract:This paper presents CFD analysis of shrouded diameter in Aerosol Sampling inlet. Different shrouded diameter for the Sampling inlet will be simulated and discussed in detail. The objective of the design is to optimizing the Sampling inlet flow necessary for achieving high efficiency of Aerosol Sampling, while minimizing disturbance to the aircraft which carries Aerosol Sampling inlet. The design optimization was performed with the computational fluid dynamics (CFD) code FLUENT. The shrouded diameter to minimizing flow disturbance is 150mm. A shrouded diameter understanding derived from the CFD analysis could improve shrouded design.
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Simulation of Aerosol Sampling Inlet for Different Outlet Angle
Applied Mechanics and Materials, 2013Co-Authors: Bao Qing Wang, Rong Hui Chen, Ze Bei Wang, Shu YaoAbstract:Performance of Aerosol Sampling inlet for different diffuser outlet angle is compared with its velocity and pressure distribution. To get information on velocity and pressure distribution for different outlet angle, Computational Fluid Dynamic (CFD) simulation can be used. At the same time, it can achieve high efficiency of Aerosol Sampling and minimize disturbance to the aircraft which carries the system. The final design for the Sampling inlet is determined to be a design with diffuser outlet angle of 15 degree. This design was selected to keep stable for velocity and pressure, and have a less length.
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Optimizing Leading Edge Structure for Aerosol Sampling Diffuser
Applied Mechanics and Materials, 2013Co-Authors: Bao Qing Wang, Shu Yao, Ze Bei Wang, Wen Yang, Zhi Peng BaiAbstract:A diffuser leading edge has been designed for aircraft Aerosol Sampling. The diffuser leading edge fluid was conducted using the CFD. The diffuser inlet, middle and outlet diameter is 35.3, 100 and 35.3 mm, respectively. The angle of the diffuser inlet and outlet is 4°. The diffuser inlet and outlet with leading edge have achieved isokinetic Sampling, and have stable flow and pressure distribution. It is suggested that CFD simulation can be useful for improving the optimum the diffuser.
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Flow Analysis of a Shrouded Aerosol Sampling Inlet
Applied Mechanics and Materials, 2013Co-Authors: Bao Qing Wang, Shu Yao, De Qing Wang, Zhi Peng Bai, Xin Hua WangAbstract:A shrouded Aerosol Sampling inlet has been designed from high-speed aircraft. The Sampling inlet was conducted using the CFD to perform a flow simulation. The shroud diameter is 150 mm. The inlet is located 180mm from the shroud entrance plane. The shroud is 300 mm long. Results are presented graphically, showing the shrouds have provided significant improvements in flow characteristics. Straighten the streamlines of gas of Sampling inlet for flow angles up to five degrees. It is suggested that CFD simulation can be useful for improving the optimum a shrouded Aerosol Sampling inlet.
