Paper Information

Journal:   AEROSPACE MECHANICS JOURNAL   MAY 2007 , Volume 3 , Number 1; Page(s) 91 To 103.
 
Paper: 

COMPUTATIONAL SIMULATION OF TWO-DIMENSIONAL TURBULENT FILM COOLING, USING LES APPROACH AND CONSIDERING DENSITY RATIO EFFECTS

 
Author(s):  RAMEZANIZADEH M.*, SAEIDI M.H., TAYEBI RAHNI M.
 
* MECH. ENG. DEPT., SHARIF UNIVERSITY OF TECHNOLOGY
 
Abstract: 

Film cooling of a two-dimensional flat plate at different jet to cross flow velocity ratios (R) is simulated at the jet Reynolds number of 4700, using large eddy simulation (LES) approach. Our computational methodology includes the use of finite volume method, applying the unsteady SIMPLE algorithm and a multi-block and non-uniform staggered grid. The governing equations have been discretized applying the Power-Law scheme for the spatial terms and the Crank-Nicholson scheme for the temporal terms. Two solution approaches are discussed here, namely: 1-neglecting and 2-considering density ratio effects. The results showed that the density ratio has significant effects on the flow structures, namely on the penetration, the expansion, and the reattachment point of the vortical regions. Therefore, it changes the temperature distribution and the film cooling effectiveness, and thus, it should not be easily neglected.

 
Keyword(s): LARGE EDDY SIMULATION (LES), FILM COOLING EFFECTIVENESS, DENSITY RATIO, JET INTO CROSS FLOW
 
References: 
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