• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>SAE AeroTech Congress Exhibition >The Jet Fuel Hydrodynamic Cavitation Bubble Size with Cavitation Power and Energy from Rayleigh-Plesset Equation
【24h】

The Jet Fuel Hydrodynamic Cavitation Bubble Size with Cavitation Power and Energy from Rayleigh-Plesset Equation

机译：喷射燃料流体动力空化泡沫尺寸，具有瑞利 - Plesset方程的空化功率和能量

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cavitation erosion in aircraft engine and control systems is a major concern in hydrodynamic power units. In developing turbulent flow of low pressure and high velocities, a certain amount of cavitation erosion is not unusual. Cavitation can occur with the presence of fuel vapor or air bubbles dissolved in the fuel tank that are transported through the system. Cavitation erosion is caused by collapse of the bubble, which occurs violently and creates a pressure shock wave of fluid. Striking a solid surface, the shock wave can cause progressive damage if it persists. A kinetic cavitation power rate is developed to make a meaningful estimation of the cavitation erosion rate theoretically, which then can be validated with laboratory experiments. Theoretically, we manipulate parameters such as bubble size, collapse pressure, and energy for a given fuel system design, finding variation within each component of the system. However, cavitation erosion rates vary wildly even when relative developments and comparisons are made. These variations are attributed to the simplicity of governing equations, boundary condition settings, and bubble sizing and geometry assumption differences of given derivation formulations. The jet fuel's bubble size, collapsing pressure, and surrounding fluid pressure, influenced by fuel properties due to temperature variation, appear to be the key factors in cavitation power and energy when predicting component life and degradation of efficiency in engine control systems.
机译：飞机发动机和控制系统中的空化腐蚀是流体动力学单元的主要问题。在开发低压和高速度的湍流中，一定量的空化腐蚀是不寻常的。在燃料蒸汽或溶解在通过系统运输的燃料箱中的燃料蒸汽或空气气泡的存在可能发生空化。空化腐蚀是由泡沫塌陷引起的，这剧烈发生并产生流体的压力冲击波。撞击固体表面，如果持续存在，冲击波会导致逐渐损坏。理论上，开发了动力空化功率率以使空化侵蚀速率的有意义估计，然后可以通过实验室实验验证。从理论上讲，为给定的燃料系统设计，可以操纵诸如泡沫尺寸，塌陷压力和能量的参数，找到系统的每个部件内的变化。然而，即使在相对发展和比较时，空化侵蚀率也变得越来越差。这些变化归因于控制方程，边界条件设置和给定导出制剂的气泡大小和几何假设差异的简单性。由于温度变化导致的喷射燃料的气泡尺寸，塌陷的压力和周围的流体压力受到燃料特性的影响，似乎是在预测部件寿命和发动机控制系统中的效率降低时的空化功率和能量的关键因素。

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