Pulsating flow of mean constant flow - rate 恒定平均流量的脈動(dòng)流
Numerical study on enhancing mass transfer in grooved channel by pulsating flow 壓力邊界條件下微通道內(nèi)氣體流動(dòng)換熱特性研究
Abstract : the effect of stabilizing pressure of a stable pressure box with damping line of the air flow is studied in order to measure the pulsate flow ability of air at the intake and exhaust pipes of engine 文摘:為了測(cè)量發(fā)動(dòng)機(jī)進(jìn)、排氣管內(nèi)氣流的脈動(dòng)流動(dòng)特性,對(duì)自行設(shè)計(jì)的對(duì)氣流起穩(wěn)壓作用的阻尼穩(wěn)壓箱進(jìn)行了研究。
When the pulsating jet was introduced in the heat exchanger , pulsating flow leads to the formation of an amount of vortices near the tube wall . the boundary layer was destroyed and the mixing of liquid was improved , so heat transfer enhancement was achieved 將自激振蕩脈沖射流引入換熱器后,流體的脈動(dòng)導(dǎo)致了壁面處旋渦的大量生成,增加了流體的摻混,實(shí)現(xiàn)強(qiáng)化換熱的目的。
The unstable gas stream is characterized by oscillations with transient velocities of about + 100 m / s and frequencies from 50 - 200h / . the enhanced mixing and transport processes lead to a highly efficient moisture evaporation rate during pulsating spray drying . the computational fluid dynamics ( cfd ) method was used for the analysis and investigation of flow , temperature and humidity fields in a pulsating flow spray - drying chamber 長(zhǎng)期以來(lái),對(duì)噴霧干燥過(guò)程進(jìn)行了各種試驗(yàn)和模擬研究,但這些研究并不能揭示噴霧干燥室內(nèi)氣體運(yùn)動(dòng)狀態(tài),顆粒群的運(yùn)動(dòng)軌跡和各種熱力學(xué)參數(shù)分布信息,常規(guī)的測(cè)試手段又很難測(cè)得,而這些參數(shù)分布信息對(duì)干燥器沒(méi)計(jì)和過(guò)程優(yōu)化具有重要指導(dǎo)作用。