Book ChapterDOI
Optimization of Protrusions for an Impinging Jet on a Curved Surface
Alankrita Singh,Bhamidi V. S. S. S. Prasad +1 more
- pp 117-126
TLDR
In this paper, a single protrusion is varied at several angles with respect to the center of the plate to explore the corresponding heat transfer characteristics and then multiple protrusions are considered at desired positions to determine optimum effective location of protrusions for maximum heat transfer.Abstract:
Numerical simulations using ANSYS Fluent 17.2 are carried out to explore the heat transfer characteristics of jet impingement on a protruded leading edge of a gas turbine blade. Many researchers have found that inclusion of protrusion does not improve Nusselt number though this contributes to augmentation in heat transfer due to an increase of surface area. In certain cases, the protrusion has also been found to degrade the heat transfer performance. Therefore, this work focuses on the effect of single protrusion to determine the effect of position of the protrusion on a concave surface and finally obtaining an optimized position of protrusions. The position of the single protrusion is varied at several angles with respect to the centre of the plate to explore the corresponding heat transfer characteristics. Thereafter, multiple protrusions are considered at desired positions to determine optimum effective location of protrusions for maximum heat transfer. The optimal position is determined using Genetic Algorithm.read more
References
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Journal ArticleDOI
An experimental study of slot jet impingement cooling on concave surface: effects of nozzle configuration and curvature
TL;DR: In this paper, an experimental study has been carried out for jet impingement cooling on a semi-circular concave surface when jet flows were ejected from three different slot nozzles.
Journal ArticleDOI
Heat transfer enhancement on a microchannel heat sink with impinging jets and dimples
TL;DR: In this article, a microchannel heat sink with impinging jets (MIJ) with different dimples structures, including convex, concave, and mixed dimples, was compared with MIJ without dimples by numerical simulation and the application of the field synergy principle.
Proceedings ArticleDOI
An Experimental Evaluation of Advanced Leading Edge Impingement Cooling Concepts
TL;DR: In this article, the authors measured the convective heat transfer coefficient of impingement for different target wall roughness geometries of an airfoil leading edge, for jet to wall spacings and exit flow schemes.
Journal ArticleDOI
Numerical study of turbulent slot jet impingement cooling on a semi-circular concave surface
TL;DR: In this article, the flow field and heat transfer characteristics of a slot turbulent jet impinging on a semi-circular concave surface with uniform heat flux have been carried out numerically.
Journal ArticleDOI
Comparisons of Pins/Dimples/Protrusions Cooling Concepts for a Turbine Blade Tip-Wall at High Reynolds Numbers
TL;DR: In this article, a two-pass channel with 180 deg turn and arrays of circular pins, hemispherical dimples, or protrusions internally mounted on the tip-wall was evaluated.
Related Papers (5)
Experimental and numerical investigation of heat transfer and friction performance for turbine blade tip cap with combined pin-fin-dimple/protrusion structure
Surface Curvature Effect on Slot-Air-Jet Impingement Cooling Flow and Heat Transfer Process
Chie Gau,C. M. Chung +1 more