本文關(guān)鍵詞：不同布置H型鰭片管束傳熱流動(dòng)準(zhǔn)則關(guān)聯(lián)式　出處：《煤炭學(xué)報(bào)》2017年03期 　論文類型：期刊論文

  更多相關(guān)文章： H型鰭片管束 布置方式 Nu關(guān)聯(lián)式 Eu關(guān)聯(lián)式

【摘要】：從低低溫省煤器的布置方式入手,以具有防磨、防積灰特點(diǎn)的H型鰭片管束為例,采用數(shù)值模擬的方法研究其在順列和錯(cuò)列兩種布置方式下的傳熱與流動(dòng)特性。結(jié)果表明:在順、錯(cuò)列兩種布置方式下,當(dāng)縱向管排數(shù)≥15時(shí),對(duì)Nu與Eu的影響可以忽略;進(jìn)口流速、鰭片寬度、鰭片厚度、鰭片間距、開縫寬度和橫向節(jié)距分別對(duì)兩種布置方式下H型鰭片管束的Nu數(shù)與Eu數(shù)影響結(jié)果相同。鰭片寬度對(duì)Nu影響最大,鰭片間距對(duì)Eu影響最大,管束順列布置時(shí),開縫寬度對(duì)Nu與Eu影響最小,管束錯(cuò)列布置時(shí),縱向節(jié)距對(duì)Nu數(shù)與Eu數(shù)影響最小。根據(jù)模擬數(shù)據(jù)擬合了H型鰭片管束在兩種布置方式下分別對(duì)應(yīng)的Nu與Eu準(zhǔn)則關(guān)聯(lián)式。研究結(jié)果可為燃煤電站低低溫省煤器的優(yōu)化設(shè)計(jì)提供參考。
[Abstract]:Starting from the arrangement of low temperature economizer, with anti abrasion, anti fouling property of the H type finned tubes as an example, to study the two kinds of arrangement column heat transfer and flow characteristics in sequence and fault by using the numerical simulation method. The results showed that: in the CIS, staggered arrangement two next, when the longitudinal tube row number larger than 15, the effect of Nu and Eu can be ignored; the inlet velocity, fin width, fin thickness, fin spacing, slit width and lateral pitch respectively for the two kinds of arrangement of H type fin tube bundle Nu number and Eu number of the same results. The biggest influence on the fin width Nu, the greatest impact on the Eu fin spacing, bundle in-line arrangement, effect of slit width on Nu and Eu minimum, bundle staggered arrangement, longitudinal pitch with minimal impact on the Nu number and Eu number. According to Nu and Eu standards of related H type finned tubes respectively corresponding in two kinds of arrangement of the fitting simulation data The research results can provide a reference for the optimization design of low temperature economizer for coal-fired power plant.

【作者單位】： 華北理工大學(xué)冶金與能源學(xué)院;清華大學(xué)熱能工程系;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973)資助項(xiàng)目(2012CB214904)
【分類號(hào)】：TM621.2
【正文快照】： 我國(guó)為“富煤、貧油、少氣”的國(guó)家,2015年煤炭產(chǎn)量為37.5億t,占世界煤炭產(chǎn)量的47%,煤炭在我國(guó)能源結(jié)構(gòu)中的處于絕對(duì)主導(dǎo)地位。從煤炭資源特點(diǎn)來看,我國(guó)的優(yōu)質(zhì)煤種儲(chǔ)量少,低階煤儲(chǔ)量相對(duì)較多[1]。目前燃煤電站通過在尾部煙道加裝低低溫省煤器以降低排煙溫度,減少鍋爐排煙熱損，

本文編號(hào)：1403220