燃气轮机入口喇叭口或入口导叶表面形成冰或冷凝的可能性取决于进入（入口）的空气温度和相对湿度，以及喇叭口入口和入口导叶之间发生的空气压力损失，即压缩机第一级上游。根据已知的压缩机入口或入口导叶压力损失和给定的入口空气温度，可以预测入口空气相对湿度上限，以防止喇叭口至压缩机结冰或冷凝。本文报告的预测极限相对湿度是基于先前研究中使用恢复因子模拟的涡轮机进口表面温度，这与一些有限的实验非标准温度非常一致- 结冰条件数据。本研究中显示的结果涵盖了高达4 psi（27.6 kPa）的涡轮进气压力损失范围，以及70ºF至0ºF（21.1ºC至-17.8ºC）的进气温度范围。之前的研究表明，在100%相对湿度下，环境/冷却的进气温度限制在35ºF和40ºF（1.7ºC和4.4ºC）之间，以防止冷凝和进气导叶上可能形成冰。之前的研究和本研究都预测，只要相应的进气相对湿度低于一个限制值，就没有限制低进气温度来防止表面结冰，尽管气流中可能会形成雾和冰晶。 单位:双引用:研讨会论文，佐治亚州亚特兰大，2001年

The possibility of ice or condensation forming on the surfaces of the inlet bellmouth or inlet guide vanes of a gas turbine depends upon the entering (inlet) air temperature and relative humidity, along with the air pressure loss that occurs between the bellmouth inlet and the inlet guide vanes, just upstream of the first stage of the compressor. Based upon a known inlet to compressor or inlet guide vane pressure loss and a given inlet air temperature, an upper limiting inlet air relative humidity limit can be predicted to prevent icing or conden-sation in the bellmouth up to the compressor. The predicted limiting relative humidities reported here are based upon simulated turbine inlet surface temperatures from previous research using a recovery factor, which agreed well with some limited experimental non-icing condition data. The results shown in this study cover a range of turbine inlet air pressure losses up to 4 psi (27.6 kPa) and inlet air temperatures from 70ºF to 0ºF (21.1ºC to -17.8ºC). Previous research has shown that at 100% relative humidity, the ambient/cooled inlet air temperature is limited to between 35ºF and 40ºF (1.7ºC and 4.4ºC) to prevent condensation and possible ice formation on the inlet guide vanes. Both the previous research and this study predict that there is no limiting low inlet air temperature to prevent surface icing as long as the corresponding inlet air relative humidity is below a limiting value, though fog and ice crystals will probably form in the airstream.Units: Dual