分流式YSC178A型液动锤性能参数CFD计算

射流式液动锤射流元件受泥浆冲蚀易过早失效,故油气钻井用YSC178A型液动锤设计了内部分流结构以降低射流元件内流速,以提高射流元件寿命。针对内分流结构设计,应用CFD动态分析技术,对分流式YSC178A型射流式液动锤性能参数进行了数值模拟计算,并进行了实验验证。结果表明：CFD分析结果与实测结果吻合较好,计算精度可以满足工程设计需要,解决了此前在设计阶段无法计算分流条件下液动锤性能参数的问题,可为内分流式油气钻井用射流式液动锤的优化设计提供参考。

CFD calculation of the performance parameter of YSC178A hydraulic hammer with flow-dividing mechanism

Fluidic element of the liquid-jet hammer may fail to work because of erosion from mud. To improve service life of fluidic element,internal flow-dividing structure is designed for YSC178A hydraulic hammer used in oil-gas drilling to reduce the velocity within the element. Aiming at the design of internal flow-dividing structure,the performance parameter of YSC178A hydraulic hammer with flow-dividing mechanism is simulated by means of CFD dynamic analysis,and it is verified by experiments. The results show that the CFD analysis result is relatively consistent with the real test result and the calculation precision can meet the needs of engineering design,which solves the problem of calculating the performance parameter of liquid-jet hammer at the designing stage and can provide a reference for the optimization design of the liquid-jet hammer with internal flow-dividing mechanism in oil and gas drilling.