Parametric study of injection from the casing in an axial turbine

Abbasi, Sarallah; Gholamalipour, Afshin

doi:10.1177/0957650919877276

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…The control methods of the TLF comprise active and passive methods. Active methods mainly include the casing injection, 3 the tip injection 4,5 and the plasma actuator. [6][7] Passive methods principally contain the squealer tip, the winglet and the novel tip.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of novel tip configurations in a turbine cascade

Jin

Song

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Two novel tip modeling methods are proposed in this paper. One novel tip is established by the mathematical method and the other is generated by the B-spline surface. And the genetic algorithm, the orthogonal design and the Kriging model are applied to optimize two kinds of novel tips numerically. The optimal mathematical tip and the optimal B-spline tip are acquired respectively. The aerodynamic tests were investigated at the wind tunnel test section, including the flat tip, the squealer tip, the optimal mathematical tip and the optimal B-spline tip. The static pressure distributions on the casing and the blade surface were measured by the pressure taps. Meanwhile, the secondary flow and the loss were obtained by the five-hole probe at the exit section. A comparison of the simulation analysis results with the experimental results shows good agreement. Compared with the flat tip, the measured loss on the squealer tip, the optimal mathematical tip and the optimal B-spline tip is decreased by 7.2%, 10.5% and 12.6% respectively.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of novel tip configurations in a turbine cascade

Jin

Song

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Since the flow loss caused by leakage flow accounts for about 20%-40% of the total loss of the compressor, 2 researchers have adopted a variety of flow control techniques to control the tip leakage flow, such as 3D modeling treatment of blade tip, 7,8 tip air injection, 9,10 casing/hub treatment 11,12 and blade tip winglet, 13,14 so as to improve the working efficiency of the compressors. The boundary layer suction (BLS) technique was first used to control the boundary layer separation on the blade suction surface in the field of the compressor.…”

Section: Introductionmentioning

confidence: 99%

Effect of endwall suction on aerodynamic performance of compressor cascade with tip clearance at a large incidence angle

Zhang

Liu

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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In order to deeply analyze the application prospect of the boundary layer suction technique on the compressor, the flow control effect of endwall suction scheme on the tip leakage flow of a compressor cascade at a large incidence angle with complex internal flow structure and different loss proportion from the case at design incidence angle, was studied numerically, as well as on the overall aerodynamic performance. The results show that the suction scheme directly affects the structure of the tip leakage flow and makes the onset position of the tip leakage vortex move backward, which weakens the intensity and influence range of the tip leakage flow, thus improving the cascade performance in the tip region. At the large incidence angle, large flow suction makes the boundary layer separation in the low span area advance, and the corner separation region at the gap-free end expands to the upper. The position of the separation vortex shedding rises from 10% blade span under the condition without suction to about 70% blade span under the condition with the suction flow rate of 0.7%, and the separation loss increases. The overall performance of the cascade at the large incidence angle mainly depends on the increase of separation loss, while the effect of the decrease of leakage loss on it is greatly reduced. With suction, the total pressure loss coefficient of the cascade increases by about 5.7% at the incidence angle of +8°.

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Performance optimization of an axial turbine with a casing injection based on response surface methodology

Abbasi

Gholamalipour

2021

J Braz. Soc. Mech. Sci. Eng.

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Parametric study of injection from the casing in an axial turbine

Cited by 6 publications

References 24 publications

Experimental and numerical study of novel tip configurations in a turbine cascade

Experimental and numerical study of novel tip configurations in a turbine cascade

Effect of endwall suction on aerodynamic performance of compressor cascade with tip clearance at a large incidence angle

Performance optimization of an axial turbine with a casing injection based on response surface methodology

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