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SYSTEM UTILITY The WT-3106 is a unique open loop wind tunnel for thermal characterization of components, boards and heat sinks. The unit is made of Aluminum, stainless steel and Plexi-glassTM and produces flows up to 1200 ft/min (6 m/s) with the appropriate fans. Its unique polynomial shape nozzle creates uniform flow in the test section. The general characteristics of the WT-3106 are shown in the table below.
The WT-3106 can be used for the following applications: Heat Sink Testing- Characterize a variety of heat sink sizes for natural and forced convection cooling. Heat Sink Comparison- Test two heat sinks side by side and compare their thermal performance in the same environment. Component Testing- Test vehicle for component characterization. PCB Testing- Test actual or simulated PCBs for thermal and flow distribution.
Figure 1: The WT-3106 System Components
SYSTEM OPERATION General Testing: 1. 2. 3. 4. 5. 6. 7. Release the clamps on front door to have access to the test section. Mount your specimen (e.g., component, PCB or heat sink) in the test section. Clamp the door back on the WT-3106. Place flow measurement instrument in the instrument port. Connect the fan cable to the controller box. Connect the fan controller box to a DC power supply or wind tunnel controller. Important Note: Voltage to the fans cannot exceed 24 Volts-DC.
VELOCITY PROFILE Velocity distribution at the inlet of the test section of the WT-3106 was obtained for 3 different velocities. The TVS-1100 (a hot wire anemometer) system was used to map out the velocity profile at the inlet of the test section. The velocity was measured at 5 points in the x direction and at 17 points in the Y direction. The nominal velocities were chosen as 200, 300 and 600 ft/min. WT-3106 test section, Top view Y Velocity measurements X= 0 Y =0 X X (inch) Y(inch) 9 9 9 9 9 9 9 0.
X (inch) Y(inch) Velocity – nominal velocity, 150 (ft/min) Velocity – nominal velocity, 450 (ft/min) 0.5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 17.
WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit malfunctions, it must be returned to the factory for evaluation.
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