散热器热冲击（B226210—064）
The radiator, placed in vehicle position, sustains 2500 temperature cycles described below, in the following conditions:
按照实际装车方式安装。持续2500次 温度循环，下面介绍检测条件。
· Radiator pre-conditioning during 2 hours at 20 °C
样件在恒温20℃环境下保持2小时
· All along the test, the radiator is submitted to an ambient air at 23 °C +/-5 °C (the air temperature sensor is located 10 cm +/-1 cm far from the radiator core)
检测时，散热器外部温度保持恒温23℃±5℃（监测温度传感器位于芯体10cm±1cm处）
· Coolant flow rate: Qomax /3
试验介质冷却液流量：Qomax /3（大约为70L/min）
· Air speed incoming on the core: zero while the core temperature is increasing. A cold air blowing is allowed while the core temperature is decreasing.
散热器芯体温度升高时气流速度需为零。散热器降温时允许有外部冷空气吹风降温
· The test mean provides a hot coolant circuit at 113 °C (B) and a cold coolant loop at 23 °C (A)
循环温度高温为113℃（B）低温为23℃（A）
· The switch duration between warming phase and cooling phase and vice-versa has to be lower than 5 s.
冷热冷却液切换时间小于5S
· The material temperature of the radiator is measured on the extreme tubes of the core. The location of the material temperature sensors on the core has to be approved by PSA.
散热器材料温度的测量应该在芯体末端的管道上进行，传感器在芯体上的放置位置必须经过PSA确认
· The coolant temperature has to be measured at inlet and at outlet of the radiator.
冷却液温度测量必须在散热器进口、出口测量
· Dt1 and Dt2 are the durations necessary to get the material temperature variation required on the radiator.
Dt1和Dt2是获得散热器材料温度变化所需的时间间隔
· Definition of the convergence of material temperature: the difference (T°material – T°coolant) has to be between + or -2 °C for at least 10 s.
材料温度收敛的定义：每个循环中当材料温度-冷却液温度=±2℃时，至少持续稳定10秒
