Researches on Heat Transfer Performance and Temperature Field Inspection Methods of Cylinder Head
Taking a high power density (HPD) diesel engine as a research object, the performance of heat transfer of cylinder head is analyzed in theory and heat transfer condition (HTC) influences on temperature field distribution of cylinder head are ascertained by orthogonal experimental designing method. Secondly, a new method of inspecting thermal crack faults inner cylinder head based on temperature parameter variation is put forward. Experimental and numerical results have been proved that when comparing with normal and crack cylinder head, under the same HTC, for thermal resistive crack inner cylinder head, the temperature values near the slit region change obviously. The maximum temperature difference among nodes near the slit region is 5.25K. Finally, according to LM inverse heat conduction problem solving method, reference on surface temperature values on cylinder head, a general program to identify inner HTC of complex object is developed and applied successfully in identifying heat transfer condition on fire-deck of cylinder head. The results are validated by experimental values and error is less than 1%, which meets the practical engineering requirements and will give a theoretic and technical gist for obtaining threedimensional temperature field of cylinder head based on its surface temperature values.
Ping ZHANG Ouyang Guangyao Lv Jianming Liu Qi Guangyao OUYANG Guangyao OUYANG Guangyao OUYANG
Naval University of Engineering,China 91852 Troop of Navy in Shangrao,China
国际会议
上海
英文
1-6
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）