Experimental Investigation on Formation
Process of Thermal Boundary Layer in Cylinder and Its Influence Factors in Diesel Engines
Li Jianguo,Pan Keyu,Liu Ming'an
(School of Energy and Power Engineering,Xi'an Jiaotong University, Xi'an 710049,China)
Abstract:The measurement of the combustion flame temperature on the different positions
by normal direction in cylinder of diesel engine was conducted.The effects of the
combustion flame,and operating and structural parameters of diesel engine were
investigated.The experimental results show that the flow turbulence enhances when fuel
burns,and the thickness of thermal boundary layer reduces with the increase in the
load,speed,and compression ratio of the diesel engine.In addition,the thickness of thermal
boundary layer nearly does not change while the water temperature increases.
Keywords:diesel engine;combustion flame;operating and structural parameters;thermal
boundary layer