• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Effects of Heat Transfer in Divergent Section of Laval Nozzle on Exhaust Velocity and Area Ratio
【24h】

Effects of Heat Transfer in Divergent Section of Laval Nozzle on Exhaust Velocity and Area Ratio

机译：熔喷喷嘴发散段传热对排风速度和面积比的影响

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effects of heating or cooling of the supersonic flow in a Laval nozzle have been investigated numerically. We focus on the exhaust velocity and the area ratio at given expansion ratios, which are ranged from 30 to 16,000. This range is equivalent to the area ratio from 4 to 400 at the specific heat ratio of 1.3 under isentropic expansion. Two types of heat profile are considered: pulsed heat transfer (PHT) and distributed heat transfer (DHT). The relations of Rayleigh flow and isentropic expansion are used for PHT. The exhaust velocity is higher than the isentropic value for the case where heat is provided near the throat. In other cases, the exhaust velocity is less than the isentropic value. The equivalent point of heat transfer is introduced for DHT. Using this equivalent point, the results for DHT exhibit the same trend as the results for PHT. This indicates that the effects of DHT can be predicted directly from results for PHT without numerical analyses.
机译：数值研究了拉瓦尔喷嘴中超声流的加热或冷却效果。在给定的膨胀比（范围从30到16,000）下，我们关注排气速度和面积比。该范围相当于等熵膨胀下比热比为1.3时的4〜400的面积比。考虑两种类型的热分布：脉冲热传递（PHT）和分布式热传递（DHT）。瑞利流与等熵膨胀之间的关系用于PHT。对于在喉咙附近提供热量的情况，排气速度高于等熵值。在其他情况下，排气速度小于等熵值。为DHT引入了等效的热传递点。使用该等效点，DHT的结果显示与PHT的结果相同的趋势。这表明可以从PHT结果直接预测DHT的效果，而无需进行数值分析。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号