Heat Transfer Investigation for Multihole Aircraft Turbine Blade Cooling.
Final technical rept. 1 May 72-28 Feb 73,
PRATT AND WHITNEY AIRCRAFT EAST HARTFORD CONN
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Adiabatic film effectiveness and heat transfer measurements with injection of coolant air through arrays of holes in a flat plate into a uniformly moving mainstream are presented. Measurements were taken both within and downstream of the multihole pattern. The hole configurations considered are regular patterns of staggered holes. The holes are angled 30 degrees to the plates surface with the projection of the hole axis on the surface forming a 45 degree angle to the mainstream. A semi-empirical relation for the adiabatic film effectiveness is presented. Also an empirical correlation of the Stanton number is presented for flow conditions where the coolant flow dominates the fluid mechanics near the surface. Author
- Jet and Gas Turbine Engines