不同形识别方法在自启动的空洞化中的应用
Hai-Bing Jiang1, Shao-Han Zheng1, Yu-Liang Zhang2
1College of Mechanical Engineering, Quzhou University, Quzhou, 324000, China.
Scientific reports
|March 3, 2025
概括
这项研究使用数值模拟分析了自启动中的空洞化. 它确定了关键的结构和能量损失区域,发现流速和速度显著影响腔和性能.
科学领域:
- 流体动力学 流体动力学
- 热力学是一种热力学.
- 机械工程 机械工程
背景情况:
- 自动启动中的空洞化会降低性能,并造成损坏.
- 了解内部流量机制对于优化设计和运行至关重要.
- 现有的形识别方法在空洞化条件下可能会产生不同的结果.
研究的目的:
- 为了研究在自启动中空洞化过程中的内部流量机制.
- 为了比较不同的 identification 标准,并分析能量损失.
- 为了确定流量和旋转速度对化特性的影响.
主要方法:
- 使用RNG k-ε流和Schnerr-Sauer空化模型进行数值模拟.
- 在临界化条件下分析蒸汽-液体双相流.
- 应用旋转率方法,Q,λ2,Δ,λci,和 Ω标准用于结构的识别.
- 的生产理论用于分析能量损失.
主要成果:
- Ω,Q 和 λ2 标准提供了一致的 identification; Δ 和 λci 标准显示了碎片化的.
- 能量损失与的强度相关,而不是直接与度相关.
- 反流孔区域经历了最大的生产变化,特别是在高流速下.
- 推进器能量损失的差异在空洞化发生之前和之后是最显著的.
- 蒸汽体积分数随着恒定空洞系数的流量和旋转速度而增加.
结论:
- 选择形识别标准对结果产生影响, Ω,Q 和 λ2 具有更强大的影响.
- 能量损失与的强度有关,这凸显了管理强的的重要性.
- 流量和旋转速度是影响洞穴程度和能量损失的关键参数.
- 优化自启动的性能需要仔细考虑流量条件和洞穴管理.
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