Thermal Performance of Film Cooling for Two Staggered Rows of Circular Jet

Yousif, Assim H.; Al-Dabagh, Amer M.; Alwan, Muwafag Sh.

doi:10.30684/etj.2013.71249

Cited by 1 publication

(1 citation statement)

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“…The overall heat flux ratio comparing film cooling with embedded holes to unimpeded holes shows that the full trench and downstream trench spacing after the hole exit produce the highest heat flux reduction. Assim H. Yousif [6], show that the film cooling performance, film cooling effectiveness and heat transfer coefficient, are enhanced when using two rows of staggered holes with opposite orientation angles. More enhancements are obtained when the forward row embedded in rectangular trench as reported by Mowafak [12 ].…”

Section: Introductionmentioning

confidence: 99%

Film Cooling From Two Staggered Holes Rows of Opposite Injection Angles with Downstream Row Embedded In Arc Trench

Yousif¹,

Jalghaf²

2014

ETJ

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Experimental investigation of film cooling from two staggered rows holes, backward and forward; of opposite injection angles has been done. The forward holes row was embedded in arc trench. The aim of using arc trench is to enhance the poor mechanical properties of that in rectangular trench. The results of film cooling performance are given here in a form of adiabatic cooling film effectiveness and heat transfer coefficients. In the tests test warm air is blown through tunnel, and cold air through the plenum chamber. When the warm air flowed through the test section it heated the model downstream. Infrared camera is used to measure the model surface temperatures. The comparison with the same holes arrangements and same holes and trench dimensions between existing rectangular trench results and present arc trenched showed that the film cooling thermal performance for both cases are approximately very close with slight differences, these differences are more or less according to the values of blowing ratios.

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Section: Introductionmentioning

confidence: 99%