Thermal Characteristics of Air-Water Spray Impingement Cooling of Hot Metallic Surface under Controlled Parametric Conditions

作     者：Santosh Kumar Nayak Purna Chandra Mishra 

作者机构：School of Mechanical EngineeringKIIT University 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2016年第25卷第3期

页      面：266-272页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

主　　题：空气压力 金属表面 热特性 水射流 冲击冷却 受控 初始温度 喷雾碰壁 

摘      要：Experimental results on the thermal characteristics of air-water spray impingement cooling of hot metallic surface are presented and discussed in this *** controlling input parameters investigated were the combined air and water pressures,plate thickness,water flow rate,nozzle height from the target surface and initial temperature of the hot *** effects of these input parameters on the important thermal characteristics such as heat transfer rate,heat transfer coefficient and wetting front movement were measured and *** flat plate samples of mild steel with dimension 120 mm in length,120 mm breadth and thickness of 4 mm,6 mm,and 8mm respectively were *** air assisted water spray was found to be an effective cooling media and method to achieve very high heat transfer rate from the *** heat transfer rate and heat transfer coefficients were obtained for the lesser i.e,4 mm thick *** in the nozzle height reduced the heat transfer efficiency of spray *** an inlet water pressure of 4 bar and air pressure of 3 bar,maximum cooling rates670℃/s and average cooling rate of 305.23℃/s were achieved for a temperature of 850℃ of the steel plate.