Cooling structure, vortex-flow forming plate molding apparatus, and method for molding vortex-flow generating portion
First Claim
Patent Images
1. A cooling structure to cool a heat generating element by allowing a cooling fluid to flow and come into contact with the heat generating element or a base material with the heat generating element disposed thereon, comprising:
- a vortex-flow generating portion, which extends in a direction intersecting a circulation direction of the cooling fluid, and which generates a vortex flow in accordance with a flow rate of the cooling fluid,wherein the vortex-flow generating portion includes a plurality of concave portions arranged at predetermined intervals,W+=Wuτ
/ν
is set within a range of 25 to 300, where W+=Wuτ
/ν
is a value given by nondimensionalizing an opening width W as measured in meters of each of the plurality of concave portions by using a shear rate of uτ
=(Tω
/ρ
)1/2 as measured in meters per second calculated from a shear stress τ
ω
as measured in Newtons per meter squared and a fluid density ρ
as measured in kilograms per meter;
an experimental formula of a pipe friction coefficient, represented by Cf=τ
ω
/(0.5ρ
u2)=0.73 Re−
0.25 calculated from a flow rate u as measured in meters per second, the fluid density ρ
, and the Reynolds number Re; and
a kinematic viscosity ν
as measured in meters squared per second,wherein a maximum height H as measured in meters of each of the plurality of concave portions is set smaller than a distance X from an opening surface of each of the plurality of concave portions to a flow passage surface facing the opening surface, anda representative length d=4A/L is set to 0.007 m or more, wherein A as measured in meters squared is the minimum flow passage sectional area and L as measured in meters is the maximum wetted perimeter length of the flow passage section perpendicular to the circulation direction of the cooling fluid.
1 Assignment
0 Petitions
Accused Products
Abstract
A cooling structure for cooling a heat generating element allows cooling fluid to circulate around the heat generating element or a base material with the heat generating element disposed thereon. The cooling structure is provided with a vortex-flow generating portion which extends in a direction intersecting a circulation direction of the cooling fluid, and which generates a vortex flow depending on the flow rate of cooling fluid.
15 Citations
12 Claims
-
1. A cooling structure to cool a heat generating element by allowing a cooling fluid to flow and come into contact with the heat generating element or a base material with the heat generating element disposed thereon, comprising:
-
a vortex-flow generating portion, which extends in a direction intersecting a circulation direction of the cooling fluid, and which generates a vortex flow in accordance with a flow rate of the cooling fluid, wherein the vortex-flow generating portion includes a plurality of concave portions arranged at predetermined intervals, W+=Wuτ
/ν
is set within a range of 25 to 300, where W+=Wuτ
/ν
is a value given by nondimensionalizing an opening width W as measured in meters of each of the plurality of concave portions by using a shear rate of uτ
=(Tω
/ρ
)1/2 as measured in meters per second calculated from a shear stress τ
ω
as measured in Newtons per meter squared and a fluid density ρ
as measured in kilograms per meter;
an experimental formula of a pipe friction coefficient, represented by Cf=τ
ω
/(0.5ρ
u2)=0.73 Re−
0.25 calculated from a flow rate u as measured in meters per second, the fluid density ρ
, and the Reynolds number Re; and
a kinematic viscosity ν
as measured in meters squared per second,wherein a maximum height H as measured in meters of each of the plurality of concave portions is set smaller than a distance X from an opening surface of each of the plurality of concave portions to a flow passage surface facing the opening surface, and a representative length d=4A/L is set to 0.007 m or more, wherein A as measured in meters squared is the minimum flow passage sectional area and L as measured in meters is the maximum wetted perimeter length of the flow passage section perpendicular to the circulation direction of the cooling fluid.
-
-
2. A cooling structure to cool a heat generating element by allowing a cooling fluid to flow and come into contact with the heat generating element or a base material with the heat generating element disposed thereon, comprising:
-
a vortex-flow generating portion, which extends in a direction intersecting a circulation direction of the cooling fluid, and which generates a vortex flow in accordance with a flow rate of the cooling fluid, wherein the vortex-flow generating portion includes a plurality of concave portions arranged at predetermined intervals, W+=Wuτ
/ν
is set within a range of 25 to 300, where W+=Wuτ
/ν
is a value given by nondimensionalizing an opening width W as measured in meters of each of the plurality of concave portions by using a shear rate of uτ
=(Tω
/ρ
)1/2 as measured in meters per second calculated from a shear stress τ
ω
as measured in Newtons per meter squared and a fluid density ρ
as measured in kilograms per meter;
an experimental formula of a pipe friction coefficient, represented by Cf=τ
ω
/(0.5ρ
u2)=0.73 Re−
0.25 calculated from a flow rate u as measured in meters per second, the fluid density ρ
, and the Reynolds number Re; and
a kinematic viscosity ν
as measured in meters squared per second,wherein a maximum height H as measured in meters of each of the plurality of concave portions is set smaller than a distance X from an opening surface of each of the plurality of concave portions to a flow passage surface facing the opening surface, and a representative length d=4A/L is set to 0.004 m or more, wherein A as measured in meters squared is the minimum flow passage sectional area and L as measured in meters is the maximum wetted perimeter length of the flow passage section perpendicular to the circulation direction of the cooling fluid. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification