论文部分内容阅读
通过数值模拟的方法研究了不同环境温度条件下超音速氧气射流的特性,并与前人的实验结果进行了对比分析.研究结果表明:与低温环境条件相比,高温环境条件下超音速氧气射流的速度衰减受到抑制,射流核心段长度得到延长;不同环境温度条件下,氧气射流的温度随着氧气射流的扩散不断升高,最终趋于环境温度;射流的压力分布趋势与射流速度分布趋势一致.数值模拟得到的射流速度、温度和压力结果与实测值吻合度较高.
The characteristics of supersonic oxygen jets under different ambient temperatures were studied by numerical simulation and compared with previous experimental results. The results show that compared with the low temperature environment, the supersonic oxygen jet The velocity decay of jet was restrained and the length of jet core was extended. The temperature of oxygen jet increased with the diffusion of oxygen jet and finally reached the ambient temperature under different ambient temperature conditions. The trend of jet pressure distribution was consistent with the jet velocity distribution The results of jet velocity, temperature and pressure obtained by numerical simulation are in good agreement with the measured values.