Articles

Pressure Controlled Vortex Design of 1.5-stage Turbine Based on the Method of Controlling Axial Velocity Variation

Expand
  • College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China

Received date: 2011-03-21

  Revised date: 2011-05-16

  Online published: 2011-12-08

Abstract

Considering distortions of the stream surface and through the search for suitable axial velocity distributions in controlled vortex design stage, a 1.5-stage subsonic axial flow turbine is designed by controlled vortex design method with the given pressure distributions to resolve circulation distributions. The turbine blades are then obtained through parameterization design and are numerically studied through 3D viscous simulation finally. The results show that this controlled vortex design method relieves the transverse pressure gradient in cascade passage to keep the low-energy fluid from moving towards the blade suction. Also, it removes the negative pressure gradient along radial direction which could reduce the passage vortex core energy. Compared with free vortex design, the controlled vortex design turbine efficiency is increased by 0.67%, and the power, 3.47%. The results also indicate that the pressure controlled vortex design method not only enhances the stage match but also prevents the blade outlet flow parameters from non-uniform to reduce mixing losses to the greatest extent.

Cite this article

DENG Qingfeng, ZHENG Qun, LIU Chunlei, LI Song . Pressure Controlled Vortex Design of 1.5-stage Turbine Based on the Method of Controlling Axial Velocity Variation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011 , 32(12) : 2182 -2193 . DOI: CNKI: 11-1929/V.20110615.1322.003

References

[1] Dorman E E, Welna H, Lindlauf R W. The application of controlled-vortex aerodynamics to advanced axial flow turbines. ASME Paper GT-1968-4, 1968.

[2] Snedden G, Dunn D, Ingram G, et al. The application of non-axisymmetric endwall contouring in a single stage, rotating turbine.ASME Paper GT-2009-59169, 2009.

[3] Duden A, Raab I, Fottner L. Controlling the secondary flow in a turbine cascade by three-dimensional airfoil design and endwall contouring[J]. Journal of Turbomachinery, 1999, 121(2): 191-199.

[4] Fischer A, Riess W, Seume J R. Performance of strongly bowed stators in a four-stage high-speed compressor[J]. Journal of Turbomachinery, 2004, 126(3): 333-338.

[5] Zhao G J, Chen F, Song Y P, et al. Experimental study on the aerodynamic performance of swept-curved blade[J]. Chinese Journal of Aeronautics, 2004, 17(3): 136-141.

[6] Vad J, Kwedikha A R A, Horváth C, et al. Aerodynamic effect of forward blade skew in axial flow rotors of controlled vortex design[J]. Journal of Power and Energy, 2007, 221(7): 1011-1023.

[7] 宁方飞, 刘晓嘉. 一种新的响应面模型及其在轴流压气机叶型气动优化中的应用[J]. 航空学报, 2007, 28(4): 813-820. Ning Fangfei, Liu Xiaojia. A new response surface model and its applications in the aerodynamic optimization of axial compressor blade profile[J]. Acta Aeronautica et Astronautica Sinica, 2007, 28(4): 813-820. (in Chinese)

[8] 樊会元, 王尚锦, 席光. 透平机械叶片的遗传优化设计[J]. 航空学报, 1999, 20(1): 47-51. Fan Huiyuan, Wang Shangjin, Xi Guang. Optimization of the blades for turbomachine by genetic algorithm[J]. Acta Aeronautica et Astronautica Sinica, 1999, 20(1): 47-51. (in Chinese)

[9] Zhou F Z, Feng G T, Jiang H D. The development of highly loaded turbine rotating blades by using 3D optimization design method of turbomachinery blades based on artificial neural network & genetic algorithm[J]. Chinese Journal of Aeronautics, 2003, 16(4): 198-202.

[10] Coucbman R S, Robbins K E, Schofield P. GE steam turbine design philosophy and technology programs. GE Power Generation, GER-3705, 1991.

[11] Cofer IV J I, Reinker J K, Sumner W J. Advances in steam path technology. GE Power Generation, GER-3713E, 1996.

[12] Plaia J M, Lear W E. Preliminary turbine design for non-uniform inlet conditions. AIAA-1997-3010, 1997.

[13] Sell M, Schlienger J, Pfau A, et al. The 2-stage axial turbine test facility "LISA". ASME Paper GT-2001-492, 2001.

[14] Stephan B, Gallus H E, Niehuis R. Experimental investigations of tip clearance flow and its influence on secondary flows in a 1-1/2 stage axial turbine. ASME Paper GT-2000-613, 2000.

[15] König S, Stoffe B, Schobeiri M T. Experimental investigation of the clocking effect in a 1.5-stage axial turbine-part I: time-averaged results[J]. Journal of Turbomachinery, 2009, 131(2): 021004-021011.
Outlines

/