摘要
采用动网格技术,结合试验测量研究不同Reω数下斯特林机管内可压缩性流体的振荡流动特性。利用热线风速仪实验测量不同Reω数下管内瞬时速度,验证了截面速度的"环状效应"。通过对比不同Reω数和径向位置处的热线实验结果与数值解,发现Reω数较低时二者偏差小于5%。相同Reω数不同截面位置和相同几何位置不同Reω数等工况,实验值与数值解之间的最大偏差小于20%,平均偏差接近11%。管中心区实验结果与数值解曲线吻合度较高,而近壁面区二者偏差偏大。实验结果与数值求解曲线的吻合度表明,动网格技术在斯特林机管内振荡流动特性研究中具有较高的适用性和准确性。
The features of oscillating flow in circle pipe for different R% numbers were researched through combining dynamic mesh technology and experiments. Hot-wire anemometer was used to measure the instantaneous velocity in pipe for different R% numbers, and "annual effect" of velocity was validated. The deviation between experimental resuits and numerical solutions was less than 5% for low R% numbers. The maximum deviation was less than 20% and average deviation was about 11% for the conditions of the same R% numbers and different positions or different R% numbers and the same positions. For the core area of pipe, numerical solutions can well match experimental results. However, the deviation was a little large for near wall section. Based on the alignment between experimental results and numerical solution curve, a high applicability and accuracy can be obtained when dynamic mesh technology was used to simulation the oscillating flow in pipe of stirling engine.
出处
《能源工程》
2014年第2期16-22,共7页
Energy Engineering
关键词
振荡流
动网格
数值模拟
热线风速仪
oscillating flow
dynamic mesh
numerical simulation
hot-wire anemometer