CAJ | 학술논문

T型管是研究冷热流体混合流动及其引起的温度振荡现象的典型几何模型，而上游带弯头的T型管又是一不可忽视的特殊情形。本文运用计算流体力学软件，采用3种湍流模型（RNG k-ε模型、SSG雷诺应力模型、LES模型）对上游带弯头T型管内冷热流体的交混现象进行模拟，并与实验数据进行了对比。结果表明：非混合区域如上游弯头内，RNG k-ε模型、SSG雷诺应力模型的模拟结果与实验结果较吻合，而在混合区内LES模型的模拟结果更能表征实际流动。
T형관시연구랭열류체혼합류동급기인기적온도진탕현상적전형궤하모형，이상유대만두적T형관우시일불가홀시적특수정형。본문운용계산류체역학연건，채용3충단류모형（RNG k-ε모형、SSG뢰낙응력모형、LES모형）대상유대만두T형관내랭열류체적교혼현상진행모의，병여실험수거진행료대비。결과표명：비혼합구역여상유만두내，RNG k-ε모형、SSG뢰낙응력모형적모의결과여실험결과교문합，이재혼합구내LES모형적모의결과경능표정실제류동。
A T-pipe junction ,especially the one with an upstream elbow ,is one of typi-cal geometries to study the mixing phenomenon of hot and cold flows and the tempera-ture fluctuation caused by mixing flow .Based on three different turbulence models (RNG k-ε,SSG Reynolds stress ,LES ) ,the mixing phenomenon in a T-pipe junction with a upstream elbow was simulated .And then ,numerical results were compared with the experimental data . The results show that the RNG k-ε model and SSG Reynolds stress model can well predict the experimental data in the non-mixed region such as the upstream elbow ,while the simulation results with LES model characterize the actual flows in the mixed zone better .