Results 191 to 200 of about 402 (231)
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Study on the blade squealer tip affecting tip leakage flow and performance of a multiphase pump
Physics of Fluids, 2023Tip clearance is the distance required between the blade tip and the pump body wall of an impeller in a helicon-axial multiphase pump, which tends to induce tip leakage flow. The tip leakage vortex formed by the interaction of tip leakage flow with the mainstream can seriously affect the performance of the multiphase pump.
Wanqi Tang +5 more
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RELATIVE CASING MOTION EFFECT ON SQUEALER TIP COOLING PERFORMANCE AT TIGHT TIP CLEARANCE
Journal of Thermal Science and Engineering Applications, 2020Abstract The effect of relative motion between the casing and turbine blade tip has been recognized as an important factor for tip aerothermal performance evaluation. Tight tip clearance is becoming one of the main objectives of engine manufacturers.
Jinfang Teng +3 more
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Robustness Analysis on the Aerothermal Performance of Turbine Blade Squealer Tip
Journal of Engineering for Gas Turbines and Power, 2022Abstract An improved efficient uncertainty quantification (UQ) analysis framework is proposed by the combination of sparse polynomial chaos expansion (PCE) and universal Kriging (UK) metamodel to obtain the surrogate model (UK-PCE). Moreover, a challenging analytical test function and an engineering test are considered to investigate the
Ming Huang, Zhigang Li, Jun Li
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Effects of Squealer Width and Height on Aerodynamic Performance of Tip-Leakage Flow of Cavity Tips
Proceedings of Global Power & Propulsion Society, 2022The scraping vortex (SV) is the dominant flow structure in the cavity tip gap. As the basic geometric parameters, it is of great significance to explore the influence mechanism of the squealer width and height on the evolution of SV. In this study, the influence mechanism of the squealer width and height on the SV evolution and aerodynamic ...
Xiaojuan He, Zhengping Zou
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Aerothermal effects of squealer openings on a cavity tip in a turbine cascade
International Journal of Turbo & Jet-Engines, 2023Abstract Both the aerodynamic and thermal performance are important for a high-pressure turbine design. This paper investigates aerothermal effects of opening on the suction side squealer of a cavity tip in a turbine cascade. There are four cases investigated, ‘Cavity’, ‘Opening 1’, ‘Opening 2’ and ‘Opening 3’.
Zuhao Liu +3 more
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Squealer Tip Leakage Flow Characteristics in Transonic Condition
Volume 6A: Turbomachinery, 2013The Over-Tip-Leakage (OTL) flow characteristics for a typical squealer tip of high pressure turbine blade, which consists of subsonic and transonic flow, have been numerically investigated in the present study, in comparison with the corresponding flat tip results. For the squealer tip employed, flow choking behavior still exists above the tip surface,
Wei Li +3 more
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Volume 2: Turbo Expo 2004, 2004
The tip leakage flow characteristics for flat and squealer turbine tip geometries are studied in the von Karman Institute Isentropic Light Piston Compression Tube facility, CT-2, at different Reynolds and Mach number conditions for a fixed value of the tip gap in a non-rotating, linear cascade arrangement.
Nicole L. Key, Tony Arts
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The tip leakage flow characteristics for flat and squealer turbine tip geometries are studied in the von Karman Institute Isentropic Light Piston Compression Tube facility, CT-2, at different Reynolds and Mach number conditions for a fixed value of the tip gap in a non-rotating, linear cascade arrangement.
Nicole L. Key, Tony Arts
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On the Computations of Double Squealer and Flat Gas Turbine Blades Tips
54th AIAA Aerospace Sciences Meeting, 2016Numerical investigation has been performed to explore the effects of the geometrical configurations for gas turbine stage on the leakage over the rotor blade tip and its effects on the performance efficiency of the turbine stage. High pressure gas turbine stage with real operating conditions was modeled and simulated using commercial CFD solver ANSYS ...
Essam E. Khalil +2 more
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Effect of Common Blade Tip Squealer Designs in Terms of Tip Clearance Loss Control
ASME 2013 Turbine Blade Tip Symposium, 2013The increase of new gas turbine’s efficiency is connected with further rise of turbine inlet temperature and sometimes as well pressure. In these conditions, first cooled turbine stages of a gas turbine engine usually consist of freestanding airfoils, which do not use an integrated shroud, to avoid risk of shroud overheating. In order to better control
N. Lomakin +3 more
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Effect of Tip Gap Height on Heat/Mass Transfer over a Cavity Squealer Tip
Journal of Fluid Machinery, 2013ABSTRACT The effect of tip gap height on heat/mass transfer characteristics on the floor of cavity squealer tip has been investigated in a turbine cascade for power generation by employing the naphthalene sublimation technique. The squealer rim height is chosen to be an optimal one of h st /c = 5.51% for the tip gap height-to-chord ratios of h/c = 1.0,
Dong Bum Kang +2 more
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