Civil turboshaft engine induction system icing test
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摘要: 围绕中国民航规章CCAR-33部R2版中第33.68条款适航要求,针对涡轴发动机提出了一种满足适航要求的试验方法,包括结冰关键点分析、结冰取证试验点选定、整机结冰取证试验三部分。结合涡轴发动机工作包线,开展结冰关键点分析以选定结冰取证试验点。在结冰包线内选择了若干结冰计算点,并计算每个点的结冰位置与结冰量。计算结果显示:温度接近0 ℃且海拔高度较低的区域是涡轴发动机结冰量显著的区域。结冰试验时在-4~-1 ℃的温度区间寻找刚出现结冰的温度点与结冰量最大的温度点。试验结果显示:结冰量最大的温度点是最严酷的结冰试验点。Abstract: Focusing on the content of China Civil Aviation Regulations CCAR-33R2 article 33.68, a test method for turboshaft engine complying with airworthiness regulation requirement was provided, including icing critical point analysis, icing certification test points determination, engine icing certification test. In combination with the turboshaft engine operating envelope, critical point analysis was conducted to determine the icing certification test points. Several icing calculation points were selected in the icing envelope, and icing positions and amounts were calculated for each point. The calculation results show that the area where the temperature is close to 0 ℃ and the altitude is low is the zone where the turboshaft engine has a significant ice amount. During the icing test, the temperature points at which ice formation just occurred and the amount of icing was the largest were found in the temperature range of -4 ℃ to -1 ℃. The test results show that the temperature point with the largest amount of icing is the most severe icing test point.
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