- 技術文章
散熱器熱沖擊檢測條件
2014-03-13 10:20:02 來源：上海涵潮試驗設備
The radiator, placed in vehicle position, sustains 2500 temperature cycles described below, in the following conditions:
按照實際裝車方式安裝。持續(xù)2500次 溫度循環(huán)，下面介紹檢測條件。
· Radiator pre-conditioning during 2 hours at 20 °C
樣件在恒溫20℃環(huán)境下保持2小時
· 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)
檢測時，散熱器外部溫度保持恒溫23℃±5℃（監(jiān)測溫度傳感器位于芯體10cm±1cm處）
· Coolant flow rate: Qomax /3
試驗介質冷卻液流量：Qomax /3（大約為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.
散熱器芯體溫度升高時氣流速度需為零。散熱器降溫時允許有外部冷空氣吹風降溫
· The test mean provides a hot coolant circuit at 113 °C (B) and a cold coolant loop at 23 °C (A)
循環(huán)溫度高溫為113℃（B）低溫為23℃（A）
· The switch duration between warming phase and cooling phase and vice-versa has to be lower than 5 s.
冷熱冷卻液切換時間小于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.
散熱器材料溫度的測量應該在芯體末端的管道上進行，傳感器在芯體上的放置位置必須經過PSA確認
· The coolant temperature has to be measured at inlet and at outlet of the radiator.
冷卻液溫度測量必須在散熱器進口、出口測量
· Dt1 and Dt2 are the durations necessary to get the material temperature variation required on the radiator.
Dt1和Dt2是獲得散熱器材料溫度變化所需的時間間隔
· 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.
材料溫度收斂的定義：每個循環(huán)中當材料溫度-冷卻液溫度=±2℃時，至少持續(xù)穩(wěn)定10秒
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