The Experts below are selected from a list of 23826 Experts worldwide ranked by ideXlab platform

Haoguang Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Flow mechanism of affecting an axial Flow Compressor performance and stability with cross blade slot casing treatments
    Proceedings of the Institution of Mechanical Engineers Part A: Journal of Power and Energy, 2019
    Co-Authors: Haoguang Zhang, Wuli Chu, Xudong Zhang, Haiyang Kuang
    Abstract:

    The objective of this study is to evaluate the effect of cross-blade slot casing treatment on the stability and performance of an axial Flow Compressor rotor. The experimental and unsteady calculat...

  • Mechanism study of performance enhancement in a subsonic axial Flow Compressor with recirculating casing treatment
    Proceedings of the Institution of Mechanical Engineers Part G: Journal of Aerospace Engineering, 2017
    Co-Authors: Wei Wang, Wuli Chu, Haoguang Zhang
    Abstract:

    The improvements in both Compressor efficiency and stability have been observed in a subsonic axial Flow Compressor with recirculating casing treatment. The study aims to understand the underlying ...

  • Experimental and numerical study of tip injection in a subsonic axial Flow Compressor
    Elsevier, 2017
    Co-Authors: Wei Wang, Wuli Chu, Haoguang Zhang, Haiyang Kuang
    Abstract:

    Parametric study of tip injection was implemented experimentally on a subsonic axial Flow Compressor to understand the underlying Flow mechanisms of stability improvement of the Compressor with discrete tip injection. Injector throat height varied from 2 to 6 times the height of rotor tip clearance, and circumferential coverage percentage ranged from 8.3% to 25% of the annulus. Static pressure fluctuations over the rotor tip were measured with fast-response pressure transducers. Whole-passage time-accurate simulations were also carried out to help us understand the Flow details. The combinations of tip injection with traditional casing treatments were experimentally studied to generate an engineering-acceptable method of Compressor stall control. The results indicate that the maximum stability improvement is achieved when injectors are choked despite their different sizes. The effect of circumferential coverage percentage on Compressor stability depends on the value of injector throat height for un-choked injectors, and vice versa. Tip blockage in the blade passage is greatly reduced by the choked injectors, which is the primary reason for stability enhancement. The accomplishment of blockage diminishment is maintained in the circumferential direction with the unsteady effect of tip injection, which manifests as a hysteresis between the recovery of tip blockage and the recovery of tip leakage vortex. The unsteady effect is primarily responsible for the effectiveness of tip injection with a partial circumferential coverage. Tip injection cannot enhance the stability of the rotor with axial slots significantly, but it can improve the stability of the rotor with circumferential grooves further. The combined structure of tip injection with circumferential grooves is an alternative for engineering application

Xiang Chen - One of the best experts on this subject based on the ideXlab platform.

  • ICARCV - Robust control for axial-Flow Compressor - An algorithm
    2008 10th International Conference on Control Automation Robotics and Vision, 2008
    Co-Authors: Tiebao Yang, Xiang Chen
    Abstract:

    Local L2 gain method has been pursued to analyze the robustness of a family of stabilizing controllers near the rotating stall point in axial Flow Compressors. An matrix inequality is involved in computation of L2 gain which is usually very difficult to solve without resorting to numerical method. In order to reduce the computational cost, an algorithm is proposed in this paper to greatly simplify the computational complexity by converting the matrix inequality into its quadratic form. Rather than obtaining accurate approximation of the local L2 gain, the results would facilitate the robust design of the axial Flow Compressor control.

Wei Wang - One of the best experts on this subject based on the ideXlab platform.

  • Mechanism study of performance enhancement in a subsonic axial Flow Compressor with recirculating casing treatment
    Proceedings of the Institution of Mechanical Engineers Part G: Journal of Aerospace Engineering, 2017
    Co-Authors: Wei Wang, Wuli Chu, Haoguang Zhang
    Abstract:

    The improvements in both Compressor efficiency and stability have been observed in a subsonic axial Flow Compressor with recirculating casing treatment. The study aims to understand the underlying ...

  • Experimental and numerical study of tip injection in a subsonic axial Flow Compressor
    Elsevier, 2017
    Co-Authors: Wei Wang, Wuli Chu, Haoguang Zhang, Haiyang Kuang
    Abstract:

    Parametric study of tip injection was implemented experimentally on a subsonic axial Flow Compressor to understand the underlying Flow mechanisms of stability improvement of the Compressor with discrete tip injection. Injector throat height varied from 2 to 6 times the height of rotor tip clearance, and circumferential coverage percentage ranged from 8.3% to 25% of the annulus. Static pressure fluctuations over the rotor tip were measured with fast-response pressure transducers. Whole-passage time-accurate simulations were also carried out to help us understand the Flow details. The combinations of tip injection with traditional casing treatments were experimentally studied to generate an engineering-acceptable method of Compressor stall control. The results indicate that the maximum stability improvement is achieved when injectors are choked despite their different sizes. The effect of circumferential coverage percentage on Compressor stability depends on the value of injector throat height for un-choked injectors, and vice versa. Tip blockage in the blade passage is greatly reduced by the choked injectors, which is the primary reason for stability enhancement. The accomplishment of blockage diminishment is maintained in the circumferential direction with the unsteady effect of tip injection, which manifests as a hysteresis between the recovery of tip blockage and the recovery of tip leakage vortex. The unsteady effect is primarily responsible for the effectiveness of tip injection with a partial circumferential coverage. Tip injection cannot enhance the stability of the rotor with axial slots significantly, but it can improve the stability of the rotor with circumferential grooves further. The combined structure of tip injection with circumferential grooves is an alternative for engineering application

Wuli Chu - One of the best experts on this subject based on the ideXlab platform.

  • Flow mechanism of affecting an axial Flow Compressor performance and stability with cross blade slot casing treatments
    Proceedings of the Institution of Mechanical Engineers Part A: Journal of Power and Energy, 2019
    Co-Authors: Haoguang Zhang, Wuli Chu, Xudong Zhang, Haiyang Kuang
    Abstract:

    The objective of this study is to evaluate the effect of cross-blade slot casing treatment on the stability and performance of an axial Flow Compressor rotor. The experimental and unsteady calculat...

  • Mechanism study of performance enhancement in a subsonic axial Flow Compressor with recirculating casing treatment
    Proceedings of the Institution of Mechanical Engineers Part G: Journal of Aerospace Engineering, 2017
    Co-Authors: Wei Wang, Wuli Chu, Haoguang Zhang
    Abstract:

    The improvements in both Compressor efficiency and stability have been observed in a subsonic axial Flow Compressor with recirculating casing treatment. The study aims to understand the underlying ...

  • Experimental and numerical study of tip injection in a subsonic axial Flow Compressor
    Elsevier, 2017
    Co-Authors: Wei Wang, Wuli Chu, Haoguang Zhang, Haiyang Kuang
    Abstract:

    Parametric study of tip injection was implemented experimentally on a subsonic axial Flow Compressor to understand the underlying Flow mechanisms of stability improvement of the Compressor with discrete tip injection. Injector throat height varied from 2 to 6 times the height of rotor tip clearance, and circumferential coverage percentage ranged from 8.3% to 25% of the annulus. Static pressure fluctuations over the rotor tip were measured with fast-response pressure transducers. Whole-passage time-accurate simulations were also carried out to help us understand the Flow details. The combinations of tip injection with traditional casing treatments were experimentally studied to generate an engineering-acceptable method of Compressor stall control. The results indicate that the maximum stability improvement is achieved when injectors are choked despite their different sizes. The effect of circumferential coverage percentage on Compressor stability depends on the value of injector throat height for un-choked injectors, and vice versa. Tip blockage in the blade passage is greatly reduced by the choked injectors, which is the primary reason for stability enhancement. The accomplishment of blockage diminishment is maintained in the circumferential direction with the unsteady effect of tip injection, which manifests as a hysteresis between the recovery of tip blockage and the recovery of tip leakage vortex. The unsteady effect is primarily responsible for the effectiveness of tip injection with a partial circumferential coverage. Tip injection cannot enhance the stability of the rotor with axial slots significantly, but it can improve the stability of the rotor with circumferential grooves further. The combined structure of tip injection with circumferential grooves is an alternative for engineering application

Haiyang Kuang - One of the best experts on this subject based on the ideXlab platform.

  • Flow mechanism of affecting an axial Flow Compressor performance and stability with cross blade slot casing treatments
    Proceedings of the Institution of Mechanical Engineers Part A: Journal of Power and Energy, 2019
    Co-Authors: Haoguang Zhang, Wuli Chu, Xudong Zhang, Haiyang Kuang
    Abstract:

    The objective of this study is to evaluate the effect of cross-blade slot casing treatment on the stability and performance of an axial Flow Compressor rotor. The experimental and unsteady calculat...

  • Experimental and numerical study of tip injection in a subsonic axial Flow Compressor
    Elsevier, 2017
    Co-Authors: Wei Wang, Wuli Chu, Haoguang Zhang, Haiyang Kuang
    Abstract:

    Parametric study of tip injection was implemented experimentally on a subsonic axial Flow Compressor to understand the underlying Flow mechanisms of stability improvement of the Compressor with discrete tip injection. Injector throat height varied from 2 to 6 times the height of rotor tip clearance, and circumferential coverage percentage ranged from 8.3% to 25% of the annulus. Static pressure fluctuations over the rotor tip were measured with fast-response pressure transducers. Whole-passage time-accurate simulations were also carried out to help us understand the Flow details. The combinations of tip injection with traditional casing treatments were experimentally studied to generate an engineering-acceptable method of Compressor stall control. The results indicate that the maximum stability improvement is achieved when injectors are choked despite their different sizes. The effect of circumferential coverage percentage on Compressor stability depends on the value of injector throat height for un-choked injectors, and vice versa. Tip blockage in the blade passage is greatly reduced by the choked injectors, which is the primary reason for stability enhancement. The accomplishment of blockage diminishment is maintained in the circumferential direction with the unsteady effect of tip injection, which manifests as a hysteresis between the recovery of tip blockage and the recovery of tip leakage vortex. The unsteady effect is primarily responsible for the effectiveness of tip injection with a partial circumferential coverage. Tip injection cannot enhance the stability of the rotor with axial slots significantly, but it can improve the stability of the rotor with circumferential grooves further. The combined structure of tip injection with circumferential grooves is an alternative for engineering application