射流通道内双侧方柱离散热源的构形设计

Constructal Design of Double-sided Square Column Discrete Heat Sources in A Jet Channel

摘要:

基于构形理论,建立二维射流通道内导热基座上双侧方柱离散热源的散热模型,以离散热源的总纵截面面积和热源高度一定为约束条件,以系统最高温度最小化、温度均匀性因子最小化和温度梯度均匀性因子最小化为目标,以各热源之间的长度比为优化变量,考虑射流速度和热源间距对散热的影响。当热源间距和射流速度给定时,通过改变热源之间的长度比可使系统最高温度、温度均匀性因子和温度梯度均匀性因子不同程度地降低。当热源间距和热源之间的长度比给定时,随着射流速度的增大,系统最高温度、温度均匀性因子和温度梯度均匀性因子亦均不同程度地降低。

Abstract:

Based on constructal theory, a heat dissipation model of two-dimensional double-sided square column discrete heat sources on a heat conduction base in a jet channel is established. The total longitudinal section area and the height of the discrete heat sources are set as the constraints, the optimization objectives are as follows:minimizing the maximum temperature, the temperature uniformity factor and the temperature gradient uniformity factor of the system, and the length ratio between each heat source is set as the optimization variable, then the effects of the jet speed and the heat source spacing on heat dissipation are analyzed. When the heat source spacing and jet speed are given, the maximum temperature, the temperature uniformity factor and the temperature gradient uniformity factor of the system can be reduced by changing the length ratio between the heat sources. When the heat source spacing and the length ratio between heat sources are given, with the increase of the jet velocity, the maximum temperature, the temperature uniformity factor and the temperature gradient uniformity factor of the system all decrease at different degrees.