The Experts below are selected from a list of 435801 Experts worldwide ranked by ideXlab platform

Fang Feng - One of the best experts on this subject based on the ideXlab platform.

  • aerodynamic characteristics of straight bladed vertical axis wind turbine with a curved outline wind gathering device
    Energy Conversion and Management, 2020
    Co-Authors: Shouyang Zhao, Fang Feng, Guoqiang Tong, Bin Zhao, Tagawa Kotaro
    Abstract:

    Abstract In order to improve the aerodynamic performance of the Straight-bladed Vertical Axis Wind Turbine (SB-VAWT), a Wind Gathering Device (WGD) with curved-outline installed at the up and down of the rotor was proposed to obtain more wind energy. The B-spline curve construction was applied to the study of suitable curved outline of the WGD. The studied structure parameters of the WGD included the radius ratio of the upper and lower plan, inlet angle and the outlet angle. Firstly, based on the method of quadratic rotary orthogonal Combination Design, the static performance effects of these parameters of WGD on SB-VAWT were researched by three-dimensional numerical simulation. A Combination of optimum curve parameters was obtained. The influence of the WGD with different structure parameters on the starting characteristics of SB-VAWTs was also calculated to investigate the fluid field effects of WGD on rotor. Furthermore, the wind tunnel tests were carried out on the rotor with and without WGD included the rotational speed performance and output power characteristics. The results showed that both the static and dynamic performance of SB-VAWT was increased in some degree by adding the WGD with curved-outline. The maximum starting moment of SB-VAWT could be increased by 14.8%. The improvement is more obvious under the condition of low wind speed. This research can be as a useful reference for the performance improving of SB-VAWT.

  • starting performance effect of a truncated cone shaped wind gathering device on small scale straight bladed vertical axis wind turbine
    Energy Conversion and Management, 2018
    Co-Authors: Shouyang Zhao, Kotaro Tagawa, Fang Feng
    Abstract:

    Abstract In order to improve the starting performance of straight-bladed vertical axis wind turbine (SB-VAWT), an innovative truncated-cone-shaped wind gathering device (WGD) which could be installed up and down of the rotor was proposed to collect more incoming flow and increase wind speed. The main object of this study is to research the starting performance effects of the main structural parameters of the WGD on small-scale SB-VAWT. The studied parameters of the WGD included the cone angle, height and the distance to rotor. Based on the method of quadratic rotary orthogonal Combination Design, starting torque performance effects of the three parameters of WGD on SB-VAWT were researched by numerical simulation firstly. Two better structural parameter Combinations of WGD were obtained. The static flow fields around the rotor with WGD were calculated. Furthermore, the model of the two kinds of WGD were Designed and made. Wind tunnel tests were carried out on the static torque characteristics, rotational speed performance from static condition to stable rotational condition and the power characteristics at different tip speed ratios. According to the results, the new WGD proposed in this study was proved to be effective for both the static and dynamic performance improvement of SB-VAWT. This research can provide a reference for the study of optimum WGD for improving the performance of SB-VAWT.

Shouyang Zhao - One of the best experts on this subject based on the ideXlab platform.

  • aerodynamic characteristics of straight bladed vertical axis wind turbine with a curved outline wind gathering device
    Energy Conversion and Management, 2020
    Co-Authors: Shouyang Zhao, Fang Feng, Guoqiang Tong, Bin Zhao, Tagawa Kotaro
    Abstract:

    Abstract In order to improve the aerodynamic performance of the Straight-bladed Vertical Axis Wind Turbine (SB-VAWT), a Wind Gathering Device (WGD) with curved-outline installed at the up and down of the rotor was proposed to obtain more wind energy. The B-spline curve construction was applied to the study of suitable curved outline of the WGD. The studied structure parameters of the WGD included the radius ratio of the upper and lower plan, inlet angle and the outlet angle. Firstly, based on the method of quadratic rotary orthogonal Combination Design, the static performance effects of these parameters of WGD on SB-VAWT were researched by three-dimensional numerical simulation. A Combination of optimum curve parameters was obtained. The influence of the WGD with different structure parameters on the starting characteristics of SB-VAWTs was also calculated to investigate the fluid field effects of WGD on rotor. Furthermore, the wind tunnel tests were carried out on the rotor with and without WGD included the rotational speed performance and output power characteristics. The results showed that both the static and dynamic performance of SB-VAWT was increased in some degree by adding the WGD with curved-outline. The maximum starting moment of SB-VAWT could be increased by 14.8%. The improvement is more obvious under the condition of low wind speed. This research can be as a useful reference for the performance improving of SB-VAWT.

  • starting performance effect of a truncated cone shaped wind gathering device on small scale straight bladed vertical axis wind turbine
    Energy Conversion and Management, 2018
    Co-Authors: Shouyang Zhao, Kotaro Tagawa, Fang Feng
    Abstract:

    Abstract In order to improve the starting performance of straight-bladed vertical axis wind turbine (SB-VAWT), an innovative truncated-cone-shaped wind gathering device (WGD) which could be installed up and down of the rotor was proposed to collect more incoming flow and increase wind speed. The main object of this study is to research the starting performance effects of the main structural parameters of the WGD on small-scale SB-VAWT. The studied parameters of the WGD included the cone angle, height and the distance to rotor. Based on the method of quadratic rotary orthogonal Combination Design, starting torque performance effects of the three parameters of WGD on SB-VAWT were researched by numerical simulation firstly. Two better structural parameter Combinations of WGD were obtained. The static flow fields around the rotor with WGD were calculated. Furthermore, the model of the two kinds of WGD were Designed and made. Wind tunnel tests were carried out on the static torque characteristics, rotational speed performance from static condition to stable rotational condition and the power characteristics at different tip speed ratios. According to the results, the new WGD proposed in this study was proved to be effective for both the static and dynamic performance improvement of SB-VAWT. This research can provide a reference for the study of optimum WGD for improving the performance of SB-VAWT.

Tagawa Kotaro - One of the best experts on this subject based on the ideXlab platform.

  • aerodynamic characteristics of straight bladed vertical axis wind turbine with a curved outline wind gathering device
    Energy Conversion and Management, 2020
    Co-Authors: Shouyang Zhao, Fang Feng, Guoqiang Tong, Bin Zhao, Tagawa Kotaro
    Abstract:

    Abstract In order to improve the aerodynamic performance of the Straight-bladed Vertical Axis Wind Turbine (SB-VAWT), a Wind Gathering Device (WGD) with curved-outline installed at the up and down of the rotor was proposed to obtain more wind energy. The B-spline curve construction was applied to the study of suitable curved outline of the WGD. The studied structure parameters of the WGD included the radius ratio of the upper and lower plan, inlet angle and the outlet angle. Firstly, based on the method of quadratic rotary orthogonal Combination Design, the static performance effects of these parameters of WGD on SB-VAWT were researched by three-dimensional numerical simulation. A Combination of optimum curve parameters was obtained. The influence of the WGD with different structure parameters on the starting characteristics of SB-VAWTs was also calculated to investigate the fluid field effects of WGD on rotor. Furthermore, the wind tunnel tests were carried out on the rotor with and without WGD included the rotational speed performance and output power characteristics. The results showed that both the static and dynamic performance of SB-VAWT was increased in some degree by adding the WGD with curved-outline. The maximum starting moment of SB-VAWT could be increased by 14.8%. The improvement is more obvious under the condition of low wind speed. This research can be as a useful reference for the performance improving of SB-VAWT.

Lauren W Cohen - One of the best experts on this subject based on the ideXlab platform.

  • a recipe for culture change findings from the thrive survey of culture change adopters
    Gerontologist, 2014
    Co-Authors: Amy Elliot, Lauren W Cohen
    Abstract:

    PURPOSE OF THE STUDY: Descriptions of culture change adoption are often complex and varied, creating a challenge for those seeking guidance about which of the many components of culture change to adopt and in what order and Combination. Design AND METHODS: To begin to address this question, members of The Research Initiative Valuing Eldercare (THRIVE) developed and distributed an online survey to 327 known culture change adopters. Of these, 164 (50%) completed the survey. Data were analyzed to identify adopted components, co-occurrence of adopted components, and differences in these across various types of nursing home models (i.e., traditional unit, household, and small house). RESULTS: Our findings support unique co-occurrence of components across nursing home models. Results also show that homes with more traditional environments have been able to implement certain culture change components without large capital investments required by renovations. IMPLICATIONS: The adoption patterns suggest that the co-occurrence of components should be considered when pursuing organizational transformations to support culture change.

Farnaz Barneh - One of the best experts on this subject based on the ideXlab platform.

  • a rational drug Combination Design to inhibit epithelial mesenchymal transition in a three dimensional microenvironment
    bioRxiv, 2017
    Co-Authors: Farnaz Barneh, Mehdi Mirzaie, Payman Nickchi, Tuan Zea Tan, Jean Paul Thiery, Mehran Piran
    Abstract:

    Epithelial-Mesenchymal Transition (EMT) is the major player of tumor invasiveness whose inhibition is challenged by the redundancy of multiple inducing factors in the tumor microenvironment. Here, we applied a systems pharmacology approach by integrating network-based analyses with multiple bioinformatic resources to propose a combinatorial drug regimen that reverses EMT phenotype in aggressive cancers. The results demonstrated that histone deacetylases were central targets to relay tumor-host interactions by tuning the expression of multiple epithelial versus mesenchymal genes. Moreover, SRC and IKBK served as the principal intracellular kinases regulating information flow from tumor microenvironment to multiple signaling pathways associated with EMT. To experimentally validate these predictions, we inhibited the pinpointed targets with already prescribed drugs and observed that whereas low dose mono-therapy failed to limit cell dispersion in a three-dimensional (3D) microfluidic device as a metric of EMT, the combinatorial regimen fully inhibited dispersion and invasion of cancer cells in collagen spheroids toward co-cultured endothelial cells while maintaining their survival. Taking into account Food and Drug Administered (FDA)-approval as well as safety profiles of the proposed drugs, we offer a combinatorial regimen with immediate translational implications to inhibit EMT in aggressive cancers. Besides, our study provides a grasp on the interdisciplinary methodologies behind a plethora of the introduced biologist-friendly bioinformatic tools for bench and bed cancer scientists to help them effectively plan their experiments.

  • a rational drug Combination Design proves to inhibit epithelial mesenchymal transition in a three dimensional microenvironment
    bioRxiv, 2017
    Co-Authors: Farnaz Barneh, Mehdi Mirzaie, Payman Nickchi, Mehran Piran, Mona Salimi, Fatemeh Goshadrou, Amir R Aref, Mohieddin Jafari
    Abstract:

    Epithelial-Mesenchymal Transition (EMT) is the major player of tumor invasiveness whose inhibition is challenged by the redundancy of multiple inducing factors in the tumor microenvironment. Here, we applied a systems pharmacology approach by integrating network-based analyses with multiple bioinformatic resources to propose a combinatorial drug regimen that reverses EMT phenotype in aggressive cancers. The results demonstrated that histone deacetylases were central targets to relay tumor-host interactions by tuning the expression of multiple epithelial versus mesenchymal genes. Moreover, SRC and IKBK served as the principal intracellular kinases regulating information flow from tumor microenvironment to multiple signaling pathways associated with EMT. To experimentally validate these predictions, we inhibited the pinpointed targets with already prescribed drugs and observed that whereas low dose mono-therapy failed to limit cell dispersion in a three-dimensional (3D) microfluidic device as a metric of EMT, the combinatorial regimen fully inhibited dispersion and invasion of cancer cells in collagen spheroids toward co-cultured endothelial cells while maintaining their survival. Taking into account Food and Drug Administered (FDA)-approval as well as safety profiles of the proposed drugs, we offer a combinatorial regimen with immediate translational implications to inhibit EMT in aggressive cancers. Besides, our study provides a grasp on the interdisciplinary methodologies behind a plethora of the introduced biologist-friendly bioinformatic tools for bench and bed cancer scientists to help them effectively plan their experiments.