Blade tip heat transfer

Blade Tip Heat Transfer

In recent years, considerable effort has been made in enhancing understanding and predictive capability for high pressure turbine shroudless blade tip heat transfer by the group (Zhang, O’Dowd, Virdi and He) based on the high speed linear cascade (HSLC). The experimental campaign is closely coupled with CFD (HYDRA) for ‘two-way’ validations and insightful analyses (the biggest lesson learned has been that neither side should be taken for granted!). The findings have been much more far reaching than initially expected.

References:

- A. Wheeler, N. Atkins and L. He,  “Turbine Blade Tip Heat Transfer in Low Speed and High Speed Flows”, Journal of Turbomachinery, Vol.133. No.4, 2011.

- D. O’Dowd, Q. Zhang, L. He, M. Oldfield, P. M. Ligrani, B.CY Cheong and I. Tibbott  “Aero-thermal Performance of a Winglet at Engine Representative Mach and Reynolds Numbers, Journal of Turbomachinery, Vol.133. No.3, 2011.

- Zhang, Q., O’Dowd, D.O., He, L., Wheeler, A.P.S., Ligrani, P.M.,  B. C.Y. Cheong, “Over-Tip Shock Wave Structure and its Impact on Turbine Blade Tip Heat Transfer”,   Journal of Turbomachinery, Vol.133. No.4, 2011.

- Zhang, Q.  and  He, L.,  “Over-tip Choking and Its Implications on Turbine Blade Tip Aerodynamic Performance,  AIAA Journal of Propulsion and Power, Vol.27, No.5, pp1008-1014, Sept-Oct, 2011.

- L. He, Q. Zhang, A Wheeler and N Atkins, “An Aerofoil Structure” (Over-tip Shaping),            

            UK Patent, GB 1017797.0, filed October 2010;

            European  Patent,  EP11184088.0, filed Oct 2011

            U.S. Patent,  US 13/269,113, filed Oct 2011;

- L. He, Q. Zhang, Q, and A. Rawlinson, “Turbine Blade” (Shaped Squealer Blade Tip for Cooling Enhancement), UK Patent, GB1223193.2, filed Dec 2012.