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題 名 | 艦載垂直發射系統非穩態流場之數值研究=A Numerical Study on the Unsteady Flow Field of a Shipboard Vertical Launching System |
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作 者 | 吳庭瑞; | 書刊名 | 新新科技年刊 |
卷 期 | 11 2015.01[民104.01] |
頁 次 | 頁98-107 |
分類號 | 595.95 |
關鍵詞 | 計算流體力學; 垂直發射系統; 導焰排煙; CFD; VLS; Gas management system; |
語 文 | 中文(Chinese) |
中文摘要 | 本文是對艦載飛彈垂直發射系統之導焰排煙非穩態流場進行數值研究,數值模擬的分析工具採用商用軟體ANSYS FLUENT,物理模式為二維軸對稱Reynolds-Averaged Navier-Stokes方程式、成份守恆方程式及Spalart-Allmaras單方程式紊流模式,幾何模式則是對類似美軍Mk 41型態的導焰排構型做適當的二維軸對稱近似及簡化。依據本文數值分析結果,穩態的部份顯示緩衝室蓄壓能力及壓力分佈都與三維分析結果相類似,此外檢視一系列時間之等馬赫數及等溫度圖,初步確認了緩衝室內建壓過程及發射箱內會回火等現象,對此類構型的非穩態流場特性獲得更深入的了解。數值研究的成果,建立了導焰排煙非穩態流場初步的分析能量,可做為導焰排煙初步設計階段,構型擇優的分析工具。 |
英文摘要 | In this paper, the gas management unsteady flow field of a shipboard vertical launching system(VLS) is numerically studied by the commercial software ANSYS FLUENT. Two dimensional axisymmetrical Reynolds-Averaged Navier-Stokes and species conservation equations are solved by employing Spalart-Allmaras one equation turbulence model. The geometric model is an axisymmetrical approach and assumption to a Mk 41 VLS type gas management system. The steady state numerical results are compared with three dimensional simulation results obtained in previous study. To get further insight of the unsteady flowfield, a series of Mach and temperature contours are investigated. The phenomena of the pressurizing process in the plenum and the base heating within the canister are identified. The numerical study can be applied to support the analysis of the VLS primary design. |
本系統中英文摘要資訊取自各篇刊載內容。