«ПЛІВКОВЕ ОХОЛОДЖЕННЯ КРИВОЛІНІЙНИХ ПОВЕРХОНЬ З ПОДАЧЕЮ ВТОРИННОГО ПОТОКУ ЧЕРЕЗ ОТВОРИ В ПОПЕРЕЧНІЙ ТРАНШЕЇ»
Abstract
The present research centers on the phenomenon of film cooling across curved surfaces with coolant delivery through a transverse trench. The primary objective of this work is to scrutinize the efficacy and physical characteristics of film cooling under controlled conditions, simulating a system where coolant is supplied via a single series of inclined holes within a transverse trench.
This study focuses on the examination of film cooling efficiency of surfaces characterized by both negative and positive curvature, juxtaposed with a reference flat surface. The research endeavors to delineate the impact of the curvature of the surface to the efficiency of film cooling when coolant is supplied through a sole series of inclined holes within the transverse trench. Calculations were executed under minimal external factors (low temperatures, no rotation, low turbulence) to determine “clear” impact of the curvature.
Given the intricate nature of fluid dynamics and heat transfer phenomena involved in this context, the experimental investigation was executed using computational fluid dynamics (CFD) simulations facilitated by the commercial software package ANSYS CFX 2020 R2.
The SST turbulence model, low-temperature conditions and low turbulence were used in the calculations.
The results of the calculations showed a weak influence of surface curvelinearity on the efficiency of film cooling. On a convex surface, the obtained results practically coincide with the data for a flat surface, and on a curved surface, the efficiency decreases in the region 3 < x/d < 30 at m = 1.5 and 2.0.
References
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