直、斜孔排氣對(duì)航行體繞流流動(dòng)影響:Part 2流體動(dòng)力特性
發(fā)布時(shí)間:2018-12-27 10:27
【摘要】:數(shù)值研究了直、斜孔排氣對(duì)采用等壓排氣技術(shù)的水下垂直運(yùn)動(dòng)航行體繞流流場(chǎng)特性的影響。結(jié)果表明,排氣孔附近及其下游流場(chǎng)可分為上游高壓區(qū)、后緣的過膨脹-壓縮區(qū)、下游近似等壓區(qū)、膜尾處的逆壓及順壓梯度區(qū)等五個(gè)區(qū)域;等壓區(qū)范圍與氣膜的氣相區(qū)、混合相區(qū)重合,分別通過氣相區(qū)內(nèi)氣體順流速度降低、混合相區(qū)內(nèi)流體逆流速度降低而得到等壓特性;斜孔排氣時(shí)的水流與氣流間相互作用減弱,排氣速度及其軸向分量、流量顯著增加,等壓氣膜形成速度、影響范圍大幅提高。
[Abstract]:The effect of straight and oblique orifice exhaust on the flow field characteristics of underwater vertical moving vehicle with isobaric exhaust technology is studied numerically. The results show that the flow field near the exhaust hole and its downstream can be divided into five regions: the upstream high pressure region, the overexpansion compression region of the rear edge, the approximate isobaric region downstream, the reverse pressure at the tail of the membrane and the pressure gradient region. The isobaric region coincides with the gas phase region of the film and the mixed phase region. The isobaric characteristic is obtained by the decrease of the downstream velocity of the gas in the gas phase region and the decrease of the countercurrent velocity of the fluid in the mixed phase region. The interaction between the flow and the airflow decreases, the exhaust velocity and its axial component, the flow rate increase significantly, and the isobaric film formation velocity increases greatly.
【作者單位】: 哈爾濱工業(yè)大學(xué)能源科學(xué)與工程學(xué)院;北京宇航系統(tǒng)工程研究所;
【基金】:國(guó)家自然科學(xué)基金委創(chuàng)新研究群體(No.51421063)
【分類號(hào)】:O357.5
本文編號(hào):2392923
[Abstract]:The effect of straight and oblique orifice exhaust on the flow field characteristics of underwater vertical moving vehicle with isobaric exhaust technology is studied numerically. The results show that the flow field near the exhaust hole and its downstream can be divided into five regions: the upstream high pressure region, the overexpansion compression region of the rear edge, the approximate isobaric region downstream, the reverse pressure at the tail of the membrane and the pressure gradient region. The isobaric region coincides with the gas phase region of the film and the mixed phase region. The isobaric characteristic is obtained by the decrease of the downstream velocity of the gas in the gas phase region and the decrease of the countercurrent velocity of the fluid in the mixed phase region. The interaction between the flow and the airflow decreases, the exhaust velocity and its axial component, the flow rate increase significantly, and the isobaric film formation velocity increases greatly.
【作者單位】: 哈爾濱工業(yè)大學(xué)能源科學(xué)與工程學(xué)院;北京宇航系統(tǒng)工程研究所;
【基金】:國(guó)家自然科學(xué)基金委創(chuàng)新研究群體(No.51421063)
【分類號(hào)】:O357.5
【相似文獻(xiàn)】
相關(guān)期刊論文 前5條
1 王一偉;黃晨光;杜特專;劉維瑋;;航行體有攻角出水全過程數(shù)值模擬[J];水動(dòng)力學(xué)研究與進(jìn)展A輯;2011年01期
2 王一偉;黃晨光;杜特專;方新;梁乃剛;;航行體垂直出水載荷與空泡潰滅機(jī)理分析[J];力學(xué)學(xué)報(bào);2012年01期
3 方雷;薛雷平;;帶空泡航行體附加質(zhì)量的數(shù)值研究[J];力學(xué)季刊;2014年01期
4 于嫻嫻;王一偉;黃晨光;杜特專;;軸對(duì)稱航行體通氣云狀空化非定常特征研究[J];船舶力學(xué);2014年05期
5 ;[J];;年期
相關(guān)碩士學(xué)位論文 前3條
1 崔震宇;水下發(fā)射航行體通氣空泡流動(dòng)特性研究[D];北京理工大學(xué);2016年
2 方雷;基于數(shù)值模擬方法研究帶空泡運(yùn)動(dòng)航行體的附加質(zhì)量[D];上海交通大學(xué);2014年
3 曾忠平;某氣密裝置復(fù)雜腔體流場(chǎng)特性研究及結(jié)構(gòu)設(shè)計(jì)優(yōu)化[D];江蘇科技大學(xué);2014年
,本文編號(hào):2392923
本文鏈接:http://sikaile.net/kejilunwen/lxlw/2392923.html
最近更新
教材專著