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Title of Journal: J Therm Sci

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Abbravation: Journal of Thermal Science

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SP Science Press

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DOI

10.1016/bs.pbr.2015.04.004

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1993-033X

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Aerodynamics design of twostage vaneless counter

Authors: Yang Zhou Huoxing Liu Wei Li Jun Zeng
Publish Date: 2011/09/13
Volume: 20, Issue: 5, Pages: 406-
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Abstract

It is one of the most efficient ways to greatly improve aeroengines’ performance by utilizing vaneless counterrotating turbine VCRT technology To supply sufficient power VCRT turns to be high Mach number large flow angle at highpressure turbine HPT rotor exit and low blade camber angle which increase difficulties to turbine design As the axial velocity ratio of HPT rotor is much larger than the conventional ones the optimal selection of VCRT velocity triangles based on theoretical analysis is developed and how the efficiency varied by HPT stator/rotor exit flow angle is also figured out The key points to design a high efficient practicable VCRT are to select velocity triangles that are characterized by low flow coefficient high outlet flow angle and large axial velocity ratio of HPT rotor Meanwhile performance comparison between convergent blade and convergentdivergent blade shows the latter is more appropriate for VCRT

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