CAJ | 학술논문

建立了天然气管道在空旷地面发生泄漏的三维模型，对高速泄漏区域进行了网格细化。利用 CFD商业软件 FLUENT 6.3对泄漏过程进行模拟，考察了大气风速、泄漏初速度和泄漏口形状(圆形和菱形)对泄漏的影响。模拟结果表明，风速对天然气泄漏喷射射流角度有较大影响，扩散范围随扩散高度而增大；泄漏初速度对天然气喷射高度有较大影响，扩散高度随泄漏初速度的加快而变高；圆形泄漏口的硫化氢泄漏范围最宽。研究结果对加深长输天然气管道泄漏扩散规律的认识、事故的预防具有一定的意义。
건립료천연기관도재공광지면발생설루적삼유모형，대고속설루구역진행료망격세화。이용 CFD상업연건 FLUENT 6.3대설루과정진행모의，고찰료대기풍속、설루초속도화설루구형상(원형화릉형)대설루적영향。모의결과표명，풍속대천연기설루분사사류각도유교대영향，확산범위수확산고도이증대；설루초속도대천연기분사고도유교대영향，확산고도수설루초속도적가쾌이변고；원형설루구적류화경설루범위최관。연구결과대가심장수천연기관도설루확산규률적인식、사고적예방구유일정적의의。
The three dimensional model of the pipe leakage in the open ground was established and the grid refinement was made to aim at the high-speed leak areas.Using CFD commercial software FLUENT 6.3 for gas pipeline leakage process was simulated.The different wind speed,the influence of the initial velocity and leak mouth shapes (round and diamond)under the condition of leak were examined.The numerical simulation results showed that the wind speed had a great influence on j et angle on gas leak.The diffusion range increased with the diffusion height.The initial velocity had a great influence on j et height.The diffusion height increased with the initial velocity increasing.The wider range of hydrogen sulfide leak was circle leak mouth. The simulation results had certain significance for long distance natural gas pipeline leakage diffusion laws awareness and accident prevention.