散热系统

Heat-radiating system

Abstract

This heat-radiating system radiates heat by means of exchanging heat between a substrate (22) and a cooling fluid. The heat-radiating system is, at the surface of the substrate (22) contacting the cooling fluid, provided with a cooling structure having a vortex flow generating section (C1) comprising a plurality of concavities (22b) that generate a vortex flow in accordance with flow conditions of the cooling fluid and extend in a direction ([beta]) intersecting the flow-through direction ([alpha]) of the cooling fluid. Operation is performed controlling within a range in which the concavity depth (H) of the vortex flow generating section and the laminar sublayer thickness ([delta]b) in the vicinity of the wall surface satisfy the relationship represented by H > [delta]b = 63.5/(Re7/8)*d (where Re is the Reynolds number, d is a characteristic length, and with the Reynolds number being Re = ud/[nu], [nu] is the kinematic viscosity of the cooling fluid, u is the flow rate of the cooling flow, and d is a characteristic length), and the cooling fluid satisfies the flow condition represented by u/[nu] <= 206*d1/7 (where u, [nu], and d are the same as those stated above).
一种通过基体(22)与冷却用流体之间的热交换进行散热的散热系统。该散热系统在基体(22)的与冷却用流体接触的表面设有冷却结构,该冷却结构具有由多个凹部(22b)构成的涡流生成部(C1),该涡流生成部(C1)在与冷却用流体的流通方向(α)交叉的方向(β)上延伸且与冷却用流体的流动条件相对应地使冷却用流体产生涡流。将涡流生成部的凹部深度H与壁面附近的层流低层厚度δb满足用H>δb=63.5/(Re7/8)×d(Re表示雷诺数,d表示特征长度,雷诺数为Re=ud/ν,ν为冷却用流体的动粘度,u为冷却用流体的流速,d为特征长度)所表达的关系,该散热系统将冷却用流体控制在满足u/ν≤206×d1/7(u、ν及d代表的含义与上述相同)所表示的流动条件的范围内并进行运转。

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Patent Citations (3)

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