Affiliation:
1. Gas Turbine Laboratory, The Ohio State University, 2300 West Case Road, Columbus, OH 43235
Abstract
Heat flux measurements are presented for the uncooled blades of a one and one-half stage turbine operating at design corrected conditions with a fully cooled upstream vane row and with rotor disk cavity purge flow. This paper highlights the differences in blade heat flux and temperature caused by uniform, radial, and hot streak inlet temperature profiles. A general discussion of temperature profile migration is provided in Part I, and Part III presents data for hot streak magnitudes and alignments. The heat flux and fluid temperature measurements for the blade airfoil, platform, angel wing (near the root), and tip as well as for the stationary outer shroud are influenced by the vane inlet temperature profile. The inlet temperature profile shape can be clearly observed in the blade Stanton number measurements, with the radial and hot streak profiles showing a greater redistribution of energy than the uniform case due to secondary flows. Hot-gas segregation is observed to increase with the strength of the temperature distortion. Measurements for the hot streak profile show a segregation of higher temperature fluid to the pressure surface when compared with a uniform profile. The introduction of vane and purge cooling is found to further accentuate the flow segregation due to coolant migration to the suction surface.
Reference30 articles.
1. Aerodynamics and Heat Transfer for a Cooled One and One-Half Stage High-Pressure Turbine–Part I: Vane Inlet Temperature Profile Generation and Migration;Mathison;ASME J. Turbomach.
2. Heat Transfer for the Blade of a Cooled Stage and One-Half High-Pressure Turbine, Part I: Influence of Vane Cooling and Disk Cavity Purge Flow;Mathison
3. Heat Transfer for the Blade of a Cooled One and One-Half Stage High-Pressure Turbine, Part II: Influence of Purge Cooling Variation;Mathison
4. Aerodynamics and Heat Transfer for a Cooled One and One-Half Stage High-Pressure Turbine–Part III: Impact of Hot Streak Characteristics on Blade Row Heat Flux;Mathison;ASME J. Turbomach.
5. On the Multiplicity of Steady Gas Flows Having the Same Streamline Pattern;Munk;Proc. Natl. Acad. Sci. U.S.A.
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献