【摘要】：儲煤倉由于棧橋功能要求而帶有洞口,研究開洞口的煤倉風(fēng)壓分布規(guī)律和煤倉之間風(fēng)致干擾效應(yīng)更接近實(shí)際工況,現(xiàn)行規(guī)范中沒有明確煤倉棧橋洞口尺寸設(shè)計的要求,基于此,運(yùn)用FLUENT軟件和計算流體力學(xué)(CFD)技術(shù),在采用SSTκ彘-ω湍流模型的基礎(chǔ)上,對開洞煤倉風(fēng)荷載分布規(guī)律進(jìn)行了數(shù)值風(fēng)洞計算研究。分析了單倉不同棧橋洞口尺寸下門洞周圍風(fēng)壓分布規(guī)律;對比開洞口單雙倉在不同風(fēng)攻角下的風(fēng)致干擾效應(yīng);改變雙倉棧橋洞口相對位置時受擾倉的風(fēng)壓分布規(guī)律。結(jié)果表明:此類開洞口煤倉的最優(yōu)棧橋洞口尺寸為4m×4m,為以后的開洞口煤倉設(shè)計提供依據(jù);兩煤倉風(fēng)致干擾效應(yīng)顯著,前后煤倉的遮擋效應(yīng)非常明顯;雙倉棧橋洞口最不利位置為10°,在今后的雙倉設(shè)計選型中應(yīng)盡量避免此種位置關(guān)系。
[Abstract]:The coal storage bunker has a hole because of the functional requirements of the trestle bridge. The distribution of the wind pressure and the wind-induced interference effect between the coal bunkers are more closely related to the actual working conditions. Based on this, there is no clear requirement for the size design of the coal bunker bridge opening in the current code. Based on the SST 魏-蠅 turbulence model and FLUENT software and computational fluid dynamics (CFD) technique, the wind load distribution of coal bunkers with open holes is studied by numerical wind tunnel calculation. The distribution law of wind pressure around the portal under the different entrance dimensions of single storehouse is analyzed, the wind-induced interference effect of single and double warehouse at different wind attack angle is compared, and the wind pressure distribution law of disturbed bunker is changed when the relative position of tunnel entrance of double-storehouse trestle bridge is changed. The results show that the optimal hole size of this kind of opening coal bunker is 4 m 脳 4 m, which provides the basis for the design of the coal bunker in the future, the wind-induced interference effect of the two coal bunkers is obvious, and the shielding effect of the former and the back bunkers is very obvious. The most unfavorable position at the entrance of double warehouse trestle bridge is 10 擄, which should be avoided in the design and selection of double warehouse in the future.
【作者單位】： 遼寧工程技術(shù)大學(xué)力學(xué)與工程學(xué)院;
【分類號】：TU312.1
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本文編號：2416869