本文選題：氣動干擾分離 + 渦模擬�。� 參考：《航天返回與遙感》2016年03期

【摘要】：文章基于一種簡易"浸入邊界技術(shù)"與流固耦合方法對超聲速來流條件下的三維降落傘系統(tǒng)進行了數(shù)值模擬。文章分析了降落傘系統(tǒng)(太空艙和降落傘衣)流場產(chǎn)生的氣動干擾對傘衣外形變形動力學(xué)的影響以及降落傘設(shè)計參數(shù)(如拖拽距離參數(shù))對降落傘性能表現(xiàn)的影響,同時檢驗了分離渦模擬方法在三維超聲速降落傘數(shù)值模擬中的適用性。結(jié)果表明,當(dāng)拖拽距離參數(shù)很小時,傘衣出現(xiàn)了嚴重的收縮現(xiàn)象;當(dāng)距離增大時,觀測到了傘開口的"呼吸現(xiàn)象",阻力系數(shù)獲得了較大改善。另外,在拖拽距離參數(shù)較大的情況下,由于湍流尾流與傘前激波的氣動干擾影響明顯,采用分離渦模擬方法,可以獲得較層流尾流條件下更大的阻力系數(shù)。
[Abstract]:Based on a simple "immersion boundary technique" and fluid-solid coupling method, a numerical simulation of a three-dimensional parachute system under supersonic flow is presented in this paper. In this paper, the influence of aerodynamic interference caused by the flow field of parachute system (capsule and parachute coat) on the shape deformation dynamics of parachute and the influence of parachute design parameters (such as drag distance parameter) on the performance of parachute are analyzed. At the same time, the applicability of the separation vortex simulation method in the numerical simulation of three dimensional supersonic parachute is tested. The results show that when the drag distance parameter is very small, there is a serious contraction phenomenon in the canopy coat, and when the distance increases, the "breathing phenomenon" of the umbrella opening is observed, and the resistance coefficient is greatly improved. In addition, when the drag distance parameter is large, the drag coefficient can be obtained by using the separation vortex simulation method because the aerodynamic interference between turbulent wake and umbrella front shock wave is obvious.
【作者單位】： 中南大學(xué)航空航天學(xué)院;香港理工大學(xué)深圳研究院;
【分類號】：V445.23

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本文編號：2043646