Central Aerohydrodynamic Institute
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TsAGI Tested the CR929 New Wide-Body Airliner Model

15 March 2021

TsAGI (a part of NRC “Zhukovsky Institute”) completed the next phase of testing the model of a new CR929. Russian-Chinese wide-body long-haul aircraft

Earlier, the experimental studies of the thematic model with two versions of wings were conducted in the T-128 wind tunnel. The purpose was to determine the cruising aerodynamic characteristics and the controls deflection influence.

At this stage, the scientists tested CR929 crescent-wingtip basic aerodynamic model.

‘The principle difference of the wing of the model under consideration is its high tapering which reduces the structural weight. Its value is a record for domestic civil airliners. However, at the same time, this solution is a serious challenge for aerodynamicists, here it is important to prevent the occurrence of stall phenomena on the wing tips,- both at low and high flight velocities‘, said Ivan Chernyshev, D.Sc., Project Leader and Head of Rocket and Flight Dynamics.

The tests were conducted at velocities up to M=0.96 and within 3.5-5 mln Reynolds number. The researchers also used videogrammetry and liquid-crystal method for flow visualization; they also studied wing deformation. The deliverables confirmed the high L/D ratio of configuration, the project cruise speed M=0.85, and the expected model damages in WT.

The next test stage is planned for 2021. Scientists of the institute have to find out the features of the flow around the model with an adaptive trailing edge of the wing at cruising flight modes and investigate the characteristics of modified engine pylons

CR929, the wide body long-haul airliner, is a project of advanced Russian-Chinese wide-body aircraft for 250-300 passengers. It is developed by the United Aircraft Corporation (Russia) and COMAC (China). ‘C’ stands for China, ‘R’ for Russia. The commissioner of the work is the JSC Irkut Corporation.

TsAGI Press Service
+7 (495) 556-40-38
press@tsagi.ru

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