A method for measuring the rolling risk degree of an aircraft after the aircraft encounters a trailing vortex

• Main Authors: ZUO JIEJUN, WANG XUAN, LIANG HAIJUN, PAN WEIJUN, WANG YIJUAN, DENG WENXIANG, LIANG YAN'AN, LI ZHILIN, ZHENG SIRUI
• Format: Patent
• Language: Chinese; English
• Published: 21.06.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a method for measuring the rolling risk degree of an airplane after the aircraft encounters a tail vortex. The method comprises the following steps that the initial vortex ringquantity Gamma 0 and the tangential speed V Theta (r) of the front tail vortex are calculated; Based on a strip-shaped band method, simplifying the aircraft into wings, and calculating a trailing vortex induced moment M borne by a rear aircraft; And adopting the rolling torque coefficient RMC to measure the rolling risk degree of the aircraft encountering the tail vortex, and calculating the rolling torque coefficient RMC according to the induced torque M of the tail vortex. According to the method, a strip-shaped band method is used for researching and analyzing wake flow induction torque, an RMC model for measuring the encountering severity degree is established, the RMC value obtained through calculation and the RMC value under the ICAO interval standard have the good fitting degree, the applicability of the m