本文關(guān)鍵詞：多股射流入流間距對(duì)下游水力特性影響分析　出處：《水利水電技術(shù)》2016年04期 　論文類型：期刊論文

  更多相關(guān)文章： 多股射流 底流消能 入流間距 流態(tài) 立軸漩渦

【摘要】：基于RNG k-ε紊流模型和VOF自由表面追蹤法,采用非均勻結(jié)構(gòu)網(wǎng)格技術(shù),建立了三維紊流數(shù)學(xué)模型,并對(duì)多股底流水躍進(jìn)行了三維模擬,詳細(xì)分析了入流間距對(duì)多股底流消能下游流態(tài)的影響規(guī)律,探討了不同孔距比下消力池內(nèi)的漩渦特性。研究結(jié)果表明:入流間距對(duì)單股主流兩側(cè)流態(tài)影響顯著,當(dāng)孔距比大于1.5時(shí),有回流形成;當(dāng)孔距比大于等于2.0時(shí),在弗汝德數(shù)約為7.0條件下,下游消力池底板附近已形成不同強(qiáng)度的立軸漩渦,所得成果可為相似研究提供參考。
[Abstract]:Based on RNG k- 蔚 turbulence model and VOF free surface tracing method, a three-dimensional turbulent mathematical model is established by using non-uniform structure mesh technology, and a three-dimensional simulation of multi-strand bottom income jump is carried out. The influence of inlet spacing on the downstream flow state of multi-strand bottom flow dissipation is analyzed in detail. The swirl characteristics in the stilling pool with different hole spacing ratios are discussed. The results show that the inflow spacing has a significant effect on the flow pattern on both sides of a single main stream. When the pore distance ratio is greater than 1.5, the reflux is formed. When the hole distance ratio is greater than 2.0 and the Froude number is about 7.0, the vertical vortex with different strength has been formed near the bottom plate of the downstream stilling pool. The results obtained can provide a reference for the study of similarity.
【作者單位】： 新疆額爾齊斯河流域開發(fā)工程建設(shè)管理局;中國(guó)水利水電科學(xué)研究院;
【基金】：國(guó)家自然科學(xué)基金(51309256)
【分類號(hào)】：TV135.2
【正文快照】： 高水頭、大流量的泄洪消能設(shè)計(jì)、安全運(yùn)行問(wèn)題一直是近年來(lái)水利水電工程界所關(guān)心的熱點(diǎn)問(wèn)題。底流消能是利用在消力池內(nèi)產(chǎn)生水躍進(jìn)行消能的一種傳統(tǒng)的消能方式,但由于需要規(guī)模較大、下游消力池臨底水力學(xué)指標(biāo)過(guò)高等因素制約了底流消能工的運(yùn)用。多股底流消能在每股主流兩側(cè)增，

本文編號(hào)：1437682