TsAGI tests the MC-21-300 aircraft mockup in engine thrust reversal rating
26 December 2016
The Central AeroHydrodynamic Institute named after professor N.E. Zhukovsky (TsAGI, part of the National Research Center “Institute named after N.E. Zhukovsky”) has carried out bench tests of the MC-21-300 aircraft mockup in engine thrust reversal rating. The tests were ordered by Irkut Corporation.
In TsAGI’s full-scale wind tunnel the conditions of aircraft landing and deceleration on a runway, with the engine thrust reversal enabled, were simulated. The goal of the tests was to estimate the aircraft operation safety and gas-dynamic stability limits of the propulsion unit upon enabling engine thrust reversers.
To achieve the goal, TsAGI used a second-to-none technique of simulating the aircraft and engine aerodynamics at runway deceleration, which the Institute developed.
The tests provided the necessary data on the influence of engine thrust reversal on performance of controls, aircraft stability and sensitivity, including cases of aircraft and engine failures during runway deceleration. At the same time the conditions preventing reverse jets from being thrown to the engine air intake were determined, and methods to ensure steady operation of the engine in these conditions were proposed.
“TsAGI’s testing method with the use of weight and aerometry measurements, and modern optical and thermal imaging methods of flow visualization have enabled detailed research of the flow pattern and aircraft characteristics, depending on engine ratings and runway speed of the aircraft,” Aleksander Chevagin, the Head of the Aircraft Propulsion Unit Aerodynamics Department of TsAGI explained. “The data received on the aircraft aerodynamics in engine thrust reversal rating will be used for preparing a new Russian liner for the first flight.”