Process air inlet channel capable of weakening ground vortex and design method thereof

Abstract

The invention discloses a process air inlet channel capable of weakening ground vortexes and a design method thereof. The process air inlet channel comprises a variable-profile flow guide basin and an air inlet passage straight section, and the variable-profile flow guide basin is fixedly connected with the air inlet passage straight section; the variable-profile flow guide basin comprises a first flow guide basin and a second flow guide basin, the first flow guide basin is of an equal-profile structure, and the profile of the first flow guide basin is of a hyper-elliptic equation; the second flow guide basin is of a variable surface structure, and the molded surface of the second flow guide basin is a hyper-elliptic equation; and the connected profiles of the first flow guide basin and the second flow guide basin are in tangent constraint. The ground vortex intensity is weakened, and the maximum air inlet flow coefficient, the maximum air inlet outlet total pressure recovery coefficient and the minimum air inlet outlet circumferential distortion index are achieved. During ground test run, the flow guide basin can be replaced by a flow guide basin with a fixed profile to obtain a larger flow coefficient according to a ground vortex parting line under the working condition of no ground vortex, and the design is simple and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of engine testing, in particular to a process air inlet capable of weakening ground vortices and a design method thereof. Background technique [0002] The aero-engine is the "heart" of an aircraft, and its technical status is a key factor in determining the aircraft's combat performance and combat readiness. As an important facility for engine testing, the test bench plays a pivotal role in the entire life cycle of an aero-engine. With the continuous expansion of engine test subjects and use environments, it is urgent to establish a test bench that can meet the test tasks in various scenarios. Among them, the good or bad factors of the test bench are mostly determined by the air inlet. The performance of the inlet depends on whether the surface design of the diversion basin can meet the maximum flow coefficient of the inlet, the largest recovery coefficient of the total pressure at the outlet of the inlet,...

AI Technical Summary

Problems solved by technology

It is not difficult to imagine that the non-broad free-flow air intake caused by the limited ground clearance can affect the accurate evaluation of the performance of the engine test bench, and the conditions such as the wind speed in the field may cause distortion, which threatens the safety of the engine at any time

Images