本文選題：粒子圖像測(cè)速(PIV) + 壓強(qiáng)梯度��； 參考：《航空動(dòng)力學(xué)報(bào)》2017年06期

【摘要】：介紹了基于PIV速度場(chǎng)測(cè)量結(jié)果計(jì)算壓強(qiáng)梯度的基本原理和3種不同的計(jì)算方法,并通過(guò)對(duì)流高斯渦模型系統(tǒng)研究了離散格式選取、PIV參數(shù)設(shè)置和流場(chǎng)特征等對(duì)壓強(qiáng)梯度計(jì)算的影響.結(jié)果表明:PIV速度測(cè)量的精度是壓強(qiáng)梯度計(jì)算的關(guān)鍵性影響因素,1%噪聲對(duì)結(jié)果的影響比其他過(guò)程高約2個(gè)數(shù)量級(jí);時(shí)間分辨率和空間分辨率的設(shè)置并非越高越好,而是有個(gè)合適的中間值;拉格朗日方法在大多數(shù)情況下優(yōu)于歐拉方法,但當(dāng)流動(dòng)結(jié)構(gòu)較復(fù)雜時(shí)性能較差,應(yīng)根據(jù)流動(dòng)類(lèi)型和流場(chǎng)特征合理選取壓強(qiáng)梯度計(jì)算方法.
[Abstract]:The basic principle of calculating pressure gradient based on PIV velocity field measurement results and three different calculation methods are introduced. The influence of the parameter setting of discrete scheme and the characteristics of flow field on the calculation of pressure gradient is studied systematically by convection Gao Si vortex model. The results show that the accuracy of the velocity measurement of the 1% PIV is the key factor in the calculation of the pressure gradient. The effect of 1% noise on the results is about 2 orders of magnitude higher than that of the other processes, and the setting of the temporal and spatial resolution is not as high as possible. The Lagrangian method is superior to Euler method in most cases, but when the flow structure is more complex, the pressure gradient calculation method should be reasonably selected according to the flow type and flow field characteristics.
【作者單位】： 中國(guó)空氣動(dòng)力研究與發(fā)展中心空氣動(dòng)力學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)空氣動(dòng)力研究與發(fā)展中心氣動(dòng)噪聲控制重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(11602290,11504417) 振動(dòng)與噪聲控制技術(shù)裝備預(yù)研項(xiàng)目(51334060301) 中國(guó)空氣動(dòng)力研究與發(fā)展中心創(chuàng)新基金項(xiàng)目
【分類(lèi)號(hào)】：O35
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本文編號(hào)：1932570