Numerical and experimental study of field synergy analysis in water jet impingement based on minimum entropy generation method
Numerical and experimental study of field synergy analysis in water jet impingement based on minimum entropy generation method
复制标题
基于最小熵产生法的水射流冲击场协同分析数值与实验研究
DOI：
10.1016/j.applthermaleng.2016.01.157
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发表时间：
2016-04
影响因子：
6.4
通讯作者：
Liu, Wenjie
中科院分区：
文献类型：
--
作者：
Zhang, Bo;Hamid, Mohammed O. A.;Liu, Wenjie
对场协同原理的详细研究主要集中在数值方法上，而对场协同原理的首次推导进行实验验证的文献很少。因此，在一个简单的加热板表面进行了实验分析。实验采用红外热视系统和专业高速摄像机进行。在2602 ~ 6505相对较低的射流雷诺数范围内，采用FSP对四种不同构型的水动力和水射流速度比进行了实地研究。建立了新的解析方程，实验验证了速度流线与温度场之间的协同效应以及协同数，特别是在沿受热板横向图像清晰的中间积分区域。基于最小熵生成MEG方法建立了层流热流场协同方程，并对其进行了较低雷诺数处理，以减少计算量和时间成本。在考虑粘滞耗散机制产热约束的前提下，设置传热过程的不可逆性，推导出新的层流热协同优化方程。根据速度的变化原理，通过拉格朗日乘子的泛函变分，给出了新的含附加体积力的Navier-Stokes方程，用于数值模拟对流换热。同时求解与粘性耗散相关的输入常数等于- 1.0 e05的场协同方程（fx, fy, fz），可以得到几个协同流场，随着H/D比的增加，熵产率逐渐增加。
Most detailed reviews of field synergy principle FSP are mainly focused on numerical approaches, while validating first deduction of FSP experimentally is very rare. Therefore, an experimental analysis is carried out on a simple heated plate surface. Experiments are conducted using infrared thermal-vision system and a professional high-speed camera. The field study concerns the hydrodynamic and water jet velocity ratio based on four different configurations under relatively low jet Reynolds number ranging from 2602 to 6505 and to be optimized by FSP. New analytical equations are developed to verify experimentally the synergy between velocity streamline and temperature field as well as synergy number especially in the mid integral areas where images have clear appearance along the lateral direction of the heated plate. Laminar heat flow field synergy equation is developed based on the minimum entropy generation MEG method, and it is treated for relatively low Reynolds number in order to reduce computational effort and time cost. The new proposed laminar heat synergy optimization equation is deduced by setting irreversibility of heat transfer process under the additional assumption that constraint of thermal generation by mechanism of viscous dissipation is considered. The variation principles with respect to velocity give new Navier–Stokes equation with additional volume force, which is constructed through functional variation of Lagrange multipliers to numerically simulate convective heat transfer. Solving simultaneously the field synergy equations (F x, F y, F z) for input constant related to viscous dissipation equal to− 1.0 E 05 will give several synergy flow fields which are followed by gradual increase of entropy generation rate as ratio of H/D increases.
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影响因子：
5.2
作者：
D. Lytle;B. W. Webb
通讯作者：
D. Lytle;B. W. Webb
DOI：
10.1016/j.icheatmasstransfer.2006.11.008
发表时间：
2007-03
影响因子：
7
作者：
Liangliang Ma;Zengyao Li;W. Tao
通讯作者：
Liangliang Ma;Zengyao Li;W. Tao
DOI：
10.1016/s0017-9310(96)00201-3
发表时间：
1997-04
影响因子：
5.2
作者：
J. San;Chih-Hsing Huang;Mingmin Shu
通讯作者：
J. San;Chih-Hsing Huang;Mingmin Shu
影响因子：
3.2
作者：
MOFFAT, RJ
通讯作者：
MOFFAT, RJ
DOI：
10.1016/j.ijheatmasstransfer.2006.03.034
发表时间：
2006-10
影响因子：
5.2
作者：
Fuchang Xu;M. Gadala
通讯作者：
Fuchang Xu;M. Gadala