Finned heat sink tunnel test device primarily for a heat exchanger, the heat sink performance test, the use of quantitative thermostated wind drift after stabilization, then through the radiator for heat exchange, the temperature difference before and after the generation of enthalpy tested for heat transfer performance of a wind tunnel type devices, to improve the radiator, the heat transfer performance of heat exchangers play an important role. The test stand is based on product characteristics exchanger large size, high wind, high heat load design, based JB / T 8577-2005 "internal combustion engine water radiator technical conditions", JIS D 1614-2000 "and other standards developed car radiator Run performance quantitative detection equipment heat exchangers wind tunnel test bench test method can refer to the following technical specifications for performance testing radiator: 2. Typical test conditions and specimen size 2.1 test conditions "heat exchanger wind tunnel test bed" to A typical engine radiator to achieve the following performance test conditions: 1) heat-carrying medium: water or oil; 3) hot air inlet temperature: about 40 ℃; 4) into the air (fresh air) temperature: outdoor temperature; 2.2 Specimen Specifications 1) meet the customer the maximum size of the heat exchanger to do the test; 2) test the wind Ga = 15,000 ~ 30,000 m3 / h;. 3) heat dissipation Q≤150kW 3, test bench system composed of "heat exchanger wind tunnel test bed "in Figure 1 below, were tested components from the test chamber, the test duct and electrical control systems, electric heating systems, software control, five-part test piece: 1) Working pressure:. ≤2MPa (G); 2) Temperature accuracy: ± 0.5 ℃; 3) Temperature fluctuation: ≤0.5 ℃; 4) Heating power: stainless steel high density electric heater; 5) Security measures: fault alarm, leakage protection, over voltage protection, over temperature protection, circuit protection and other security measures. 6) Medium temperature:. 80-120 ℃ test duct including fans, the main air duct and the air flow meter, hot air circulating hot air bypass damper and ventilation ducts and other components for the drive to set the amount of wind. The air passes through the heat exchanger DUT, fans in the inverter motor drive, outside air sucked from both sides, inhale the main duct, its speed is automatically adjusted according to the air flow meter signal to stabilize the set test wind speed at about Under 1500Pa pressure, the maximum wind of about 30,000m3 / h, rated power of 20kW. After the fan sucked air through the whole drift, wind speed and air flow meter steady flowing through the heat exchanger portion of hot air can be directly exhausted to the outside. Seasonal variation in order to avoid the fall and winter monsoon test machine inlet air temperature is low and the resulting ad hoc adjustment of hot air and hot air circulation ventilation bypass damper and said: When the heat sink temperature is low wind, the damper actuator will automatically reduce the damper open . ° (automatic control valve opening angle) Therefore, if the indoor temperature is lower than the inlet temperature of the test set, the set value can be automatically heated to the technical characteristics of the test duct is as follows: 1) the main duct section: W1100 × H850 mm; side air duct cross-section: W400 × L600 mm; 2) test the air volume: Ga = 20000 ~ 30000 m3 / h; 3) Fan power: ≤20 kW; 4) the specimen inlet air temperature: 30 ~ 50 ℃ ; 5) Temperature accuracy: ± 2 ℃; 6) Temperature fluctuation: ≤1 ℃; 7) the specimen into the wind inhomogeneity:. ≤0.3m / s Horizontal computer monitoring station L1400 × W700 × H1200mm, built-in Smart Thermostat, PLC-based frequency control and temperature control unit, and IPC with, for test conditions of automatic control automatic acquisition (air temperature, water temperature, water flow and air flow) and the test parameters, and each device relative control and data transfer connection