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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >Mixing characterization of highly underexpanded fluid jets with real gas expansion
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Mixing characterization of highly underexpanded fluid jets with real gas expansion

机译：用真正的气体膨胀混合高度遮盖物的液体喷射器的表征

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摘要

We report a comprehensive speed of sound database for multi-component mixing of underexpanded fuel jets with real gas expansion. The paper presents several reference test cases with well-defined experimental conditions providing quantitative data for validation of computational simulations. Two injectant fluids, fundamentally different with respect to their critical properties, are brought to supercritical state and discharged into cold nitrogen at different pressures. The database features a wide range of nozzle pressure ratios covering the regimes that are generally classified as highly and extremely highly underexpanded jets. Further variation is introduced by investigating different injection temperatures. Measurements are obtained along the centerline at different axial positions. In addition, an adiabatic mixing model based on non-ideal thermodynamic mixture properties is used to extract mixture compositions from the experimental speed of sound data. The concentration data obtained are complemented by existing experimental data and represented by an empirical fit.
机译：我们报告了具有实际气体膨胀的Underexpanded燃料喷气机的多组分混合的综合声速。本文提出了几种参考测试用例，具有明确定义的实验条件，提供了用于验证计算模拟的定量数据。两个注射液与其关键特性的根本不同地呈现为超临界状态并在不同压力下排出冷氮。数据库具有各种喷嘴压力比，其覆盖通常被分类为高度高度高度高度的Underexpanded喷射的制度。通过研究不同的注射温度来引入进一步的变化。沿着不同轴向位置的中心线获得测量。另外，基于非理想热力混合物性能的绝热混合模型用于从声音数据的实验速度中提取混合物组合物。所获得的浓度数据由现有的实验数据互补，并由经验合适表示。

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