穿音速流通過機翼釋放彈體之參數效應數值探討

Numerical Investigation of Parametric Effects for Transonic Flows around a Store Released from a Wing

謝金祥(Jing-Hsiang Hsieh)

指導教授 ： 楊世英

國立虎尾科技大學/工程學院/航空與電子科技研究所/碩士(2011年)

https://doi.org/10.6827/NFU.2011.00067

摘要

計算流體力學的進步與電腦硬體的發展，使得數值模擬變成可行的，彈體的移動軌跡預測可以藉由數值方法而得知，模擬結果有相當高的參考價值。彈體分離後的掉落點是不感興趣的，能夠安全的分離才是主要的。
　　本文使用CFD-RC研究三維穿音速流場中，以翼型為NACA64A010，翼前緣45度角的三角翼，在機翼下方掛載一顆飛彈，進行飛彈分離模擬。成熟的Chimera技術應用在數值模擬上，並用Hole-cutting技術將多重網格重疊並切割，使Chimera模擬更加接近物理現象。針對數值模擬的不同時間下，分析彈體位置、角度、速度及其相關物理現象並與文獻中的數值解相互驗證。進而使用不同參數進行數值模擬，並探討及分析其非穩態物理現象。

關鍵字

分離 ； 穿音速 ； 三角翼 ； Chimera

並列摘要

The progress of computational fluid dynamic and development of computer hardware make the numerical simulation become feasible. Store trajectory is predictable using numerical methods. Results of simulation are highly referred. The falling point of store separation is not mainly concerned, whereas safe separation is.
In this thesis, the CFD-RC is utilized to investigate 3D transonic flow around a store released from a wing. The geometry is a wing-pylon-store configuration consisting of a clipped delta wing with a 45-degree sweep and a constant NACA64A010 airfoil section. The application of Chimera technology on numerical simulation is mature. The multi-grid are overlapped and cut by using hole-cutting technology, which makes Chimera simulation closer to physical phenomena. Regarding the instantaneous result of numerical simulation, the analysis of present c.g. position, store angle, velocity and corresponding physical phenomena is evaluated by comparing the related numerical data. Then, different parameters are taken into consideration to carry out numerical calculations. The corresponding physical phenomena are investigated and analyzed.

並列關鍵字

separation ； transonic ； delta wing ； Chimera

參考文獻

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