摘要
基于计算流体动力学与有限元分析技术对某柴油机喷嘴进行了液力负荷研究,用应力波理论对该喷嘴阀座处的冲击应力进行了计算,对喷嘴进行了应力与疲劳强度分析。结果表明:喷嘴的静强度符合要求;喷孔处虽存在应力集中现象,但安全系数为8.60,有足够的应力储备;阀座处的安全系数偏低,是喷嘴最早萌生裂纹进而发生疲劳断裂的危险区域。
The liquid load of the nozzle of a diesel engine was studied based on the computational fluid dynamics （CFD） and finite element analysis （FEA）. The seating stress of the nozzle was calculated by using the theory of stress wave. Then fatigue analysis of the nozzle was performed. The results showed that the static strength of the nozzle is adequate; the stress concentrates in the jet orifice, but where the safety factor is 8.60, which is high enough; the safety factor of the valve seat is slightly low, where there is a dangerous zone to create the earliest crack.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2005年第4期32-34,共3页
Chinese Internal Combustion Engine Engineering
