CAJ | 학술논문

针对复杂工况下输气管道的泄漏检测与定位准确率低、效率不高这一难题，结合等温定位法和Runge-Kutta法(龙格-库塔法)的原理及优缺点提出改进的变步长精细Runge-Kutta法。根据管道中的气体流动过程及温度的不同处理方式，以管道的温度、压力和流速为参数确定步长求得管道从首端到末端各截面的参数，通过测量管道首末端的流量和压力可判定出输气管道泄漏的位置。通过对非等温气体管道的仿真实验，以泄漏率和定位精度作为评价指标，对等温定位法和变步长精细Runge-Kutta法定位效果进行了对比分析。仿真结果表明，对于非等温气体管道的泄漏，变步长精细Runge-Kutta法的检测与定位精度准效率高。
침대복잡공황하수기관도적설루검측여정위준학솔저、효솔불고저일난제，결합등온정위법화Runge-Kutta법(룡격-고탑법)적원리급우결점제출개진적변보장정세Runge-Kutta법。근거관도중적기체류동과정급온도적불동처리방식，이관도적온도、압력화류속위삼수학정보장구득관도종수단도말단각절면적삼수，통과측량관도수말단적류량화압력가판정출수기관도설루적위치。통과대비등온기체관도적방진실험，이설루솔화정위정도작위평개지표，대등온정위법화변보장정세Runge-Kutta법정위효과진행료대비분석。방진결과표명，대우비등온기체관도적설루，변보장정세Runge-Kutta법적검측여정위정도준효솔고。
To the problem of gas pipeline leak detection and location, combining the advantages and dis-advantages of isothermal localization method and Runge-Kutta method, according to the different treat-ment methods of the temperature, isothermal localization method and variable step precise Runge-Kutta method were compared and analyzed. Through simulation experiments of non-isothermal gas pipeline, leakage rate and positioning accuracy as the evaluation indexs, locating function of the two methods were compared and analyzed. Verification of field actual pipeline was conducted and simulation results show that for non-isothermal gas pipeline the positioning effect of variable step-size precise Runge-Kutta meth-od is better than the isothermal localization method.