冲击射流的研究概述

ON IMPINGING JET RESEARCH

冲击射流是一种既有工程应用背景，又有理论研究价值的独特的流动现象．经过长期的研究和探索，人们对这种具有很强换热效果的流动的认识不断加深，研究方法也日趋精细，从简单的实验装置发展到先进的测量系统，从单纯的实验研究发展到实验与理论计算相结合，并且不断地将其应用于新的工业流动问题，所考虑的影响因素也日益增多．但是对这种流动现象还需作更进一步的研究，特别是在冲击射流的冲击区壁面附近，实验结果和理论计算还有一定的差距．本文对冲击射流的研究现状进行了综述．

Impinging jet is a special flow phenomenon, with engineering application backgroundand theoretical research value. Through long period of study, more and more knowledge about theimpinging jet with a high heat transfer coefficient has been obtained, an(l the research methodsare more refined, from simple experimental equipment to advanced test system. Furthermore, itis continually applied to the industrial flow problems recently, taking into account more effects,combining the experimental and theoretical study instead of only experimental method.But furtherresearches about the impinging jet are needed, particularly in the vicinity of impinging wall, wherethere are great discrepajncy between the experimental data and the theoretical calculation.