Results 211 to 220 of about 977 (245)

Study on the blade squealer tip affecting tip leakage flow and performance of a multiphase pump

Physics of Fluids, 2023
Tip 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, Guangtai Shi, Yexiang Xiao, Zongliu Huang, Wei Li, Wenxiu Chen   +5 more
openaire   +1 more source

Effect of Squealer Geometry Arrangement on a Gas Turbine Blade Tip Heat Transfer

Journal of Heat Transfer, 2001
Abstract This study investigates the effect of a squealer tip geometry arrangement on heat transfer coefficient and static pressure distributions on a gas turbine blade tip in a five-bladed stationary linear cascade. A transient liquid crystal technique is used to obtain detailed heat transfer coefficient distribution.
Gm Salam Azad, Je-Chin Han, Ronald S. Bunker, C. Pang Lee   +3 more
openaire   +1 more source

Effect of Various Tip Clearance Squealer Design on Turbine Stage Efficiency

Volume 2A: Turbomachinery, 2015
This paper presents investigation of nine tip squealer design variants based on full 3D Navier-Stokes CFD calculations. In particular two main design features have been studied: the impact of relative squealer cavity rim extension and the impact of pressure side squealer cavity rim inclination on stage efficiency. All these cases have been compared for
Nikolay Lomakin, Andrey Granovskiy, Vladimir Shchaulov, Jaroslaw Szwedowicz   +3 more
openaire   +1 more source

Digital Shadow and Robust Optimization of in Service Squealer Tip Turbine Blades

Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, 2022
Abstract The term uncertainty quantification (UQ) refers to a set of techniques which are used to measure the statistical variability of several input parameters. In recent years, UQ has become increasingly relevant due to its applications in robust design and optimization (RDO).
Irene Virdis, Tiziano Ghisu, Shahrokh Shahpar, Iñaki de la Puerta, Haidong Li   +4 more
openaire   +1 more source

Heterogeneous Optimization Strategies for Carved and Squealer-Like Turbine Blade Tips

Volume 5B: Heat Transfer, 2015
Superior rotor tip geometries possess the potential to simultaneously mitigate aerodynamic losses and severe thermal loads onto the rotor overtip region. However, classical design strategies are usually constrained to a specific type of geometry, narrowing the spread of shape topologies considered during the design phase. The current paper presents two
C. De Maesschalck, S. Lavagnoli, G. Paniagua, T. Verstraete, R. Olive, P. Picot   +5 more
openaire   +1 more source

Experimental Study on Aerodynamic Loss and Heat Transfer for Various Squealer Tips

Journal of Turbomachinery, 2020
Abstract This paper presents aerodynamic loss data for five squealer configurations of a full squealer (FS), a pressure-side squealer (PS), a suction-side squealer (SS), a camberline squealer (CS), and a full-camberline squealer (FCS) in a low-speed turbine cascade. In addition, tip thermal load data are also reported for the FS, PS, and
Sang-woo Lee, Jin Sung Joo, Inkyom Kim, Jin-Sol Jung   +3 more
openaire   +1 more source

Aerothermal Optimization of Turbine Squealer Tip Geometries With Arbitrary Cooling Injection

Journal of Turbomachinery, 2019
Abstract The optimization of the turbine rotor tip geometry remains a vital opportunity to create more efficient and durable engines. Balancing the aerodynamic and thermal aspects, while maintaining the mechanical integrity, is key to reshape one of the most vulnerable and life-determining parts of the entire turbine. The ever-increasing
C. De Maesschalck, V. Andreoli, G. Paniagua, T. Gillen, B. Barker   +4 more
openaire   +1 more source

Innovative Framework for Robustness Analysis of Blade Multicavity Squealer Tip Aerothermal Performance

Journal of Thermophysics and Heat Transfer
Gas turbines are subject to various geometric and operational uncertainties, which are often overlooked in conventional research. Therefore, conclusions derived from a deterministic approach may not accurately reflect the actual gas turbine operation.
Ming Huang, Kaiyuan Zhang, Zhigang Li, Jun Li   +3 more
openaire   +1 more source

Effect of Suction Side Squealer Tip Height on Blade Tip Film Cooling in a Transonic Cascade

Volume 5: Energy Storage; Fans and Blowers; Heat Transfer: Combustors; Heat Transfer: Film Cooling
Abstract Several studies have identified that using a suction side squealer on the blade tip is beneficial for reducing leakage flow, while achieving comparable film cooling effectiveness to a full squealer. The suction side squealer increases the local pressure on the tip, and leakage through the gap is reduced.
Ming-Feng Yeh, Lesley M. Wright, Je-Chin Han   +2 more
openaire   +1 more source

Tip Leakage Losses for the Squealer Tip Winglets Designed on the Basis of Flow Visualization

Transactions of the Korean Society of Mechanical Engineers - B, 2022
Yong-Cheol Seo, Sang-Woo Lee
openaire   +1 more source