暖机对舰载机滑跃起飞安全影响分析

针对发动机不暖机会产生推力损失，进而影响舰载机滑跃起飞安全的问题，分析了暖机与不暖机两种情况下舰载机起飞极限重量的差异。建立舰载机滑跃起飞动力学模型，根据滑跃起飞安全准则，利用飞行轨迹最小爬升率不小于零判定起飞极限重量，并在不同甲板风和大气温度下比较两种跑道暖机与不暖机起飞极限重量。结果表明:暖机对105 m短跑道滑跃起飞极限重量影响更大；随着甲板风的增大，舰载机暖机与不暖机滑跃起飞极限重量相对偏差逐渐减小，其中105 m跑道对应最大偏差和最小偏差分别为2.70%和2.44%，195 m跑道对应最大偏差和最小偏差分别为2.64%和2.40%；随着大气温度升高，舰载机暖机与不暖机滑跃起飞极限重量相对偏差变化趋势先增大后变缓，其中105 m跑道对应最大偏差和最小偏差分别为2.79%和2.56%，195 m跑道对应最大偏差和最小偏差分别为2.69%和2.46%。 

Effect of heating of turbine on the safety of carrier-based aircraft ski jump takeoff

The turbine engine under unheated conditions produces thrust loss and influences the safety of carrier-based aircraft ski jump takeoff. The difference of the takeoff limit weight under heating and unheated conditions is analyzed. The dynamic model of carrier-based aircraft ski jump takeoff is established. According to the ski jump takeoff safety criterion, the takeoff limit weight is determined by the minimum climb rate in flight path, which is not less than zero. And the takeoff limit weight under heating and unheated conditions is compared when taking off from 105 m and 195 m runway with different deck wind and different air temperature. The results show that heating of turbine has a greater impact on the takeoff limit weight of 105 m short runway. With the increase of deck wind, the relative deviation of takeoff limit weight under heating and unheated conditions decreases gradually. The maximum and minimum deviation are 2.70% and 2.44% respectively when taking off from 105 m runway. The maximum and minimum deviation are 2.64% and 2.40% respectively when taking off from 195 m runway. With the increase of air temperature, the relative deviation of takeoff limit weight under heating and unheated conditions increases first and then slows down. The maximum and minimum deviation are 2.79% and 2.56% respectively when taking off from 105 m runway. The maximum and minimum deviation are 2.69% and 2.46% respectively when taking off from 195 m runway.