模擬三維液態燃料反應流的破碎和蒸發模型的評估

Evaluation of Breakup and Evaporation Models for the Simulation of Three-Dimensional Liquid-Fueled Reactive Flows

邱品瀚(Pin-Han Chiu)

指導教授 ： 牛仰堯

淡江大學/工學院/航空太空工程學系碩士班/碩士(2023年)

https://doi.org/10.6846/TKU.2023.00071

摘要

本文目的在於評估不同的液滴破碎模型搭滴蒸發模型組合下，並加上化學反應模型，在超音速衝壓引擎模擬中，模擬出複雜的物理現象。在本研究中，我們皆基於Navier-Stokes方程與拉格朗日方法並搭配LES紊流模型，模擬超音速側向噴流問題中液滴霧化蒸發間的交互作用，經比較後發現KH-RT破碎模型和蒸發模型，與實驗結果對比相當吻合。接著將其與單步的化學反應模型結合，在不同測試條件下，模擬定容燃燒問題，得到點火延遲時間，驗證化學反應模型的準確性後，將前兩個算例結合應用至實際問題中，在DLR超燃衝壓引擎進行了初步的模擬，結果與實驗有著相似的流場結構。

關鍵字

多相流 ； 噴流 ； 破碎 ； 汽化 ； 衝壓引擎

並列摘要

This paper aims to evaluate the combination of different droplet breakup models and droplet evaporation models, together with chemical reaction models, to simulate complex physical phenomenon in scramjet simulations. In this study, we use a numerical simulation based on the Navier-Stokes equation with the LES turbulence model to simulate the interaction between droplet atomization and evaporation in a supersonic side jet flow problem. After comparing the simulation results to experimental data, it is found that the KH-RT breakup models and evaporation models agree with the experimental data. Then, combining it with a single-step reaction model to simulate the constant volume combustion problem under different test conditions. After obtaining the ignition delay time, the accuracy of the single-step reaction model is verified. Finally, combine the previous test cases, apply them to real problems, and run the preliminary simulations on the DLR scramjet. The simulation results show that the flow field in the combustor has achieved similar structures to that of the experimental data.

並列關鍵字

multi-phase flow ； jet flow ； breakup ； evaporation ； scramjet engine

參考文獻

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