本文選題：滑油冷卻器 + 蒸汽動力��； 參考：《船舶工程》2016年05期

【摘要】：為研究船用滑油冷卻器流致振動和微振磨損問題,摸索滑油冷卻器易發(fā)生振動破損的薄弱部位。建立滑油冷卻器殼側(cè)及管側(cè)的三維計(jì)算模型,采用流固耦合計(jì)算方法計(jì)算滑油冷卻器殼側(cè)滑油和管側(cè)冷卻水的耦合壓力場、耦合流速場及耦合溫度場,獲得壓力、流速、溫度等關(guān)鍵運(yùn)行參數(shù)的分布規(guī)律。基于管殼式換熱器流致振動的誘發(fā)機(jī)理,揭示與流致振動密切相關(guān)的殼側(cè)流體流動能量分布規(guī)律。由于滑油橫向沖刷換熱管束,促使殼側(cè)流體摻混劇烈,導(dǎo)致殼側(cè)流體壓力場和速度場劇烈脈動,溫度場不均勻分布,殼側(cè)對流傳熱系數(shù)呈先降低再快速升高變化的規(guī)律。根據(jù)滑油流動能量分布圖譜,判定滑油冷卻器進(jìn)、出口區(qū)域的換熱管束承受流致振動破損較為嚴(yán)重,其中進(jìn)口區(qū)域換熱管承受流致振動破損最嚴(yán)重。
[Abstract]:In order to study the problems of fluid-induced vibration and micro-vibration wear of marine oil coolers, the weak parts of oil coolers are found to be prone to vibration damage. A three-dimensional calculation model of the shell side and the tube side of the oil cooler is established. The coupled pressure field, the coupled velocity field and the coupled temperature field are calculated by using the fluid-solid coupling calculation method, and the pressure and velocity of flow are obtained. Distribution of key operating parameters such as temperature. Based on the induced mechanism of fluid-induced vibration in tube and shell heat exchangers, the energy distribution of fluid flow on the shell side is revealed, which is closely related to fluid-induced vibration. Due to the lateral erosion of the heat transfer tube bundle by the oil, the mixing of the shell side fluid is intense, which leads to the intense pulsation of the pressure field and velocity field of the shell side fluid, the uneven distribution of the temperature field, and the change of convection heat transfer coefficient of the shell side first and then increases rapidly. According to the energy distribution pattern of oil flow, it is determined that the vibration damage caused by flow is more serious in the heat transfer tube bundle in the inlet and outlet areas of the oil cooler, especially in the inlet region.
【作者單位】： 中國艦船研究設(shè)計(jì)中心;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51309063)
【分類號】：U664
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本文編號：1843317