• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >FLOW CONFIGURE IN VERTICAL 180 DEGREE TURNING DUCT
【24h】

FLOW CONFIGURE IN VERTICAL 180 DEGREE TURNING DUCT

机译：垂直180度车削管道的流量配置

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

Bend is applied in many industries, which exert an influence on fluid and make the flow complicate. The second flow caused by the bend is strong enough that the flow behind it very long can be affected, so it is hard to make the flow in it steady. The long-term unsteady flow can make the pipe fatigue, so make the tube crack and leak. It is important to improve this situation. In this paper a throttle is built in the exit of the bend to control the non-homogeneous flow inside the bend, which can overcome the disadvantage of bend in industrial application. Through computed the flow field behind the bend by water, we can see that the throttle can improve the flow situation and make the flow steady behind it. Applying this method to the gas-liquid flow, the experimental result showed that the void fraction behind the bend is alike the fully developed flow. It means that the throttle can improve the two-phase flow situation in the invert U bend. At last the gas-liquid flow pattern in-bend was studied by experiment and built the flow pattern map in the vertical parts of the invert U bend. It was found that the flow pattern in the vertical part of invert U bend is different from the fully developed gas-liquid flow in vertical tube. The throttle built in the bend make the unsteady region of two-phase flow being reduced.
机译：弯管应用在许多行业中，这些行业会影响流体并使流量变得复杂。由弯曲引起的第二股流动足够强，以至于其后面的流动会受到影响，因此很难使其中的流动稳定。长期的不稳定流动会使管道疲劳，从而使管道破裂和泄漏。改善这种情况很重要。本文在弯管出口处装有节流阀，以控制弯管内的不均匀流动，可以克服弯管在工业应用中的弊端。通过计算水弯头后面的流场，我们可以看到节流阀可以改善流态，并使后面的流量稳定。将这种方法应用于气-液流动，实验结果表明，弯头后面的空隙率与充分发展的流动相似。这意味着节流阀可以改善倒U型弯时的两相流情​​况。最后通过实验研究了弯头的气液流型，并在倒U形弯的垂向部分建立了流型图。研究发现，倒U形弯管垂直部分的流型与垂直管中充分展开的气液流不同。弯头内置的节流阀可减少两相流的不稳定区域。

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