NDLI: Computational Investigation of Flow and Heat Transfer Characteristics of Impingement Cooling Channel

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ramakumar, B. V. N. Joshi, D. S. Sridhar, Murari Jong, S. Liu Daniel, C. Crites
Copyright Year	2013
Abstract	Impingement cooling offers very high heat transfer coefficients. Flow field, involved in impingement cooling is dominated by stagnation zone, transition zone and developing zone. Understanding of complex flow phenomenon and its effects on heat transfer characteristics is useful for efficient designing of impingement channels. Computational fluid dynamics (CFD) has emerged as a powerful tool for the analysis of flow and heat transfer systems. Honeywell has been investigating the use of CFD to determine the characteristics of various complex turbine blade cooling heat transfer augmentation methods such as impingement. The objective of this study is to develop CFD methodology which is suitable for computational investigation of flow and heat transfer analysis of impingement cooling through validation. Single row of circular jets impinging on concave (curved) surface has been considered for this study. The validation was accomplished with the test results of Bunker and Metzger [10] and with the correlations of Chupp et al. [7]. The parameters which are varied in this study include jet Reynolds number (Re2B = 6750–10200), target plate distance to jet diameter ratio (Z/d = 3 and 4), and target surface sharpness (i.e. radius ratio, r* = 0.2, 0.4 and 1) the simulations are performed under steady state conditions. Predicted results are compared for local endwall heat transfer results along the curve length of the mid span target wall. Flow field results obtained at different locations are presented to understand the heat transfer behavior.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791855140
DOI	10.1115/GT2013-94553
Volume Number	Volume 3A: Heat Transfer
Conference Proceedings	ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2013-06-03
Publisher Place	San Antonio, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Cooling Turbine blades Computational fluid dynamics Impingement cooling Reynolds number Flow (dynamics) Steady state Design Simulation Jets Engineering simulation Heat transfer coefficients Heat transfer
Content Type	Text
Resource Type	Article

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