Engine cylinder head cooling enhancement by mist cooling – a simulation study

Mohideen Batcha, Mohd Faizal and Hussin, Amer Isyraqi and Raghavan, Vijay R. (2008) Engine cylinder head cooling enhancement by mist cooling – a simulation study. In: International Conference on Mechanical and Manufacturing Engineering 2008 (ICME2008) : 21-23 May 200, Johor Baharu. Universiti Tun Hussein Onn Malaysia, Universiti Tun Hussein Onn Malaysia, Batu Pahat, pp. 1-5. ISBN 9789832963592

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Abstract

Among the two types of engine cooling, liquid-cooling and air-cooling, liquid cooling is widely used due to its capability to reject a larger amount of heat and air-cooling is preferred for small capacity engines in which cooling systems are much simpler in design and low in cost. In practice, piston-seize in air-cooled engines is common during long hours of operation or at higher engine speeds. The current work proposes mist cooling as a way to overcome this problem. A feasibility study is conducted where the temperature distribution in an array of plate fins, similar to fins on an engine cylinder head, is measured. The fins are subjected to constant heat flux at the base and cooled by airflow, simulating actual conditions on a cylinder head. Experiments were conducted for several air velocities ranging from 21.5 m/s to 40.4 m/s. The temperature distribution in the fin was measured at several locations simultaneously to calculate the amount of heat being transferred. These experiments were repeated with the injection of mist to compare the augmentation of heat transfer. The heat transfer coefficients increased between 200 and 400% and the surface temperatures were depressed. This proves that mist-cooling can be adopted to enhance heat transfer and lower the temperatures in air-cooled systems during critical conditions.

Item Type:Book Section
Uncontrolled Keywords:engine cooling, heat transfer enhancement, mist-cooling
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Manufacturing and Industrial Engineering
ID Code:139
Deposited By:Khairunnisa Ahmad
Deposited On:10 Mar 2010 11:41
Last Modified:29 Apr 2011 14:39

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