Results 91 to 100 of about 845 (119)

RELATIVE CASING MOTION EFFECT ON SQUEALER TIP COOLING PERFORMANCE AT TIGHT TIP CLEARANCE

Journal of Thermal Science and Engineering Applications, 2020
Abstract 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, Shaopeng Lu, Qiang Zhang, Diwei Zhu   +3 more
openaire   +1 more source

Effects of Tip Gap Film Injection From Plain and Squealer Blade Tips

Volume 3: Turbo Expo 2004, 2004
The present study investigates the effect of orthogonal tip gap film injection from a plain and squealer tip of a HPT first stage rotor blade. The pressure ratio (inlet total pressure to exit static pressure) for the cascade used was 1.2, and the experiments were run in a blow-down test rig with a four-blade stationary linear cascade.
Hasan Nasir, Srinath V. Ekkad, Ronald S. Bunker, Chander Prakash   +3 more
openaire   +1 more source

Effects of Impeller Squealer Tip on Centrifugal Compressor Performance

Journal of Engineering for Gas Turbines and Power, 2016
This paper summarizes the main results sorted out from a design of experiment (DoE) based on a validated computational fluid dynamics (CFD). Several tip recessed geometries applied to an unshrouded impeller were considered in conjunction with two tip clearance levels.
Riccardo Da Soghe, Cosimo Bianchini, Lorenzo Toni, Dante Tommaso Rubino   +3 more
openaire   +1 more source

Effects of Squealer Geometry of Turbine Blade Tip on the Tip-Leakage Flow and Loss

Journal of Thermal Science, 2021
The effective control of the tip-leakage flow and loss is of great significance to improve the aerodynamic performance of the turbine. In this paper, the evolution mechanism of tip-leakage flow in a transonic high pressure turbine with a squealer tip is investigated with numerical simulation methods.
Fei Zeng, Weihao Zhang, Yufan Wang, Xia Cao, Zhengping Zou   +4 more
openaire   +1 more source

Turbine Blade Tip Leakage Flow Control by Partial Squealer Tip and Plasma Actuators

44th AIAA Aerospace Sciences Meeting and Exhibit, 2006
In order to further the understanding of turbine tip leakage and passage ∞ow mechanisms for undesirable entropy production, an experiment was conducted in a linear cascade at the Hessert Laboratory. Blade surface and tip endwall static pressure, total pressure loss, and wake vorticity measurements were taken to document the efiects of upstream axial ...
Travis Douville, Julia Stephens, Thomas Corke, Scott Morris   +3 more
openaire   +1 more source

Aeromechanical Optimization of a Winglet-Squealer Tip for an Axial Turbine

Journal of Turbomachinery, 2010
The possibility of reducing the over tip leakage loss of unshrouded axial turbine rotors has been investigated in an experiment using a linear cascade of turbine blades and by using CFD. A numerical optimization of a winglet-squealer geometry was performed. The optimization involved the structural analysis alongside the CFD.
Zbigniew Schabowski, Howard Hodson, Davide Giacche, Bronwyn Power, Mark R. Stokes   +4 more
openaire   +1 more source

Flow Investigations in the Tip Gap of Rotor Blade Tips With Squealer Cavity

Volume 6A: Turbomachinery, 2013
The tip leakage flow in turbines is considered to be responsible/or significant machine losses. An efficient reduction of these losses by e. g. squealer cavities at rotor blade tips requires a detailed physical and quantitative understanding of the tip leakage flow.
Andreas Fischer, Jörg König, Jürgen Czarske, Clemens Rakenius, Gregor Schmid, Heinz-Peter Schiffer   +5 more
openaire   +1 more source

Robustness Analysis on the Aerothermal Performance of Turbine Blade Squealer Tip

Journal of Engineering for Gas Turbines and Power, 2022
Abstract 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
openaire   +1 more source

Effect of Shelf Squealer Tip Configurations on Film Cooling Effectiveness

Volume 5C: Heat Transfer, 2018
Film cooling effectiveness and heat transfer were measured in squealer tip configurations on the blade tip surface. Three different shelf squealer tip geometries were studied: conventional, vertical, and inclined. The experiment was carried out in a wind tunnel with an inlet mainstream Reynolds number, based on the axial chord length of the blade, of ...
JeongJu Kim, Wonjik Seo, Minho Bang, Seon Ho Kim, Seok Min Choi, Hyung Hee Cho   +5 more
openaire   +1 more source

Effect of Common Blade Tip Squealer Designs in Terms of Tip Clearance Loss Control

ASME 2013 Turbine Blade Tip Symposium, 2013
The 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, A. Granovskiy, V. Belkanov, J. Szwedowicz   +3 more
openaire   +1 more source