Air inlet channel and design method of longitudinal flow guide plate of air inlet channel

The invention relates to the technical field of aircrafts, and discloses an air inlet duct and a longitudinal guide plate design method thereof.The longitudinal guide plate design method comprises the steps that numerical simulation calculation is conducted on a reference scheme of the air inlet duct, and internal flow field data of the air inlet duct are obtained; front edge initial position points, plate opening angles, left and right side molded surfaces, rear edge position points and thickness parameters of at least two longitudinal guide plates are determined; numerical simulation calculation is conducted on the air inlet channel provided with the longitudinal flow guide plate, and flow field data in the air inlet channel of the flow guide plate scheme are obtained; and calculating an AIP surface rotational flow intensity index eta according to the internal flow field data of the air inlet channel of the guide plate scheme, and when the AIP surface rotational flow intensity index eta is greater than a pr