An Experimental Study Of The Unsteady Heat Transfer In A Short-Duration Blowdown Turbine Test Facility

Time-resolved heat transfer of HP rotor outer endwall and heat transfer article surface between HP and LP rotor were investigated both experimentally and computationally, using a 1+1/2 counter-rotating turbine as test article. The experimental work was carried out at the IET short-duration blowdown turbine test facility. The investigations can be summarized as below:1. With the analysis of the variety of parameters during the test, the comparatively steady segments of time on rotating speed, pressure ratio and time-averaged heat flux rate were identified. The appropriate segment of time for heat flux rate measurement was also identified. The stabability in heat transfer measurement of the IET short-duration blowdown turbine test facility is verified;2. The experimental investigation into the time-resolved heat transfer of HP rotor outer endwall in a 1+1/2 counter-rotating turbine revealed that large amplitude of high-frequency heat flux components were caused by small amplitude of the temperature fluctuations on the surface;3. Time-resolved heat transfer of heat transfer article surface between HP and LP rotor of a 1+1/2 counter-rotating turbine were investigated both experimentally and computationally. 2D and 3D numerical simulations were carried out to investigate the flow field and heat transfer according to the test conditions, using different CFD software. Qualitative agreement was obtained between the calculation and the measured data in time-averaged results. Reasonable explanation to the phenomena in the measurement and the calculation was given.