CAJ | 학술논문

应用CFD动态分析技术,对SC71B型液动锤内部流场进行了仿真分析,结果表明,其射流元件临界流速为20.305～22.565 m/s,大大低于凭经验预测的40 m/s.为检验这一理论预测结果,对SC71B型液动锤射流元件临界流速进行了实验测定,为21.83 m/s,表明理论预测结果与实测结果高度吻合,证明了基于CFD动态分析的液动锤射流元件临界流速理论预测方法的可行性;同时通过理论分析和实测获得了至今为止液动锤射流元件临界流速的最低值,可为研制油气钻井用低速射流元件驱动控制的液动锤提供重要参考.
응용CFD동태분석기술,대SC71B형액동추내부류장진행료방진분석,결과표명,기사류원건림계류속위20.305～22.565 m/s,대대저우빙경험예측적40 m/s.위검험저일이론예측결과,대SC71B형액동추사류원건림계류속진행료실험측정,위21.83 m/s,표명이론예측결과여실측결과고도문합,증명료기우CFD동태분석적액동추사류원건림계류속이론예측방법적가행성;동시통과이론분석화실측획득료지금위지액동추사류원건림계류속적최저치,가위연제유기찬정용저속사류원건구동공제적액동추제공중요삼고.
The technique of CFD dynamic analysis was used in the simulation of the critical flow velocity at the nozzle of the fluidic in SC71B liquid-jet hammer prototype, the result shows that the critical flow velocity ranges from 20.305 m/s to 22.565 m/s, which is obviously lower than the value of 40 m/s by empirical prediction value. In order to verify the theoretical value by CFD dynamic analysis, a laboratory test was carried out on the machine of SC71B liquid-jet hammer, the laboratory value is 21.83 m/s, which highly coincides with the theoretical value. CFD dynamic analysis is proved as a validated prediction method, meay while the lowest critical flow velocity is obtained, this value can provide very important reference to develop liquid-jet hammers controlled by fluidic elements with low critical flow velocities for oil and gas drilling.