| FENG Zi-xuan 1 ，MAO Jian-xing 2，3，4 ，HU Dian-yin 2，3，4.Review on the Development of Adjusting Mechanism in Variable Cycle Engine and Key Technologies[J].航空发动机,2023,49(1):18-26 |
| Review on the Development of Adjusting Mechanism in Variable Cycle Engine and Key Technologies |
| DOI： |
| Key Words:variable cycle engine adjusting mechanism fluid-structure interaction dynamic simulation feasibility validation key
technologies |
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| Abstract:The variable cycle engine provides wider working ranges and meets more requirements of combat missions by changing the
modes of the thermal cycle. The adjusting mechanism is the actuator for mode selection，of which the design evolves with the development
of the engine. This review is concentrated on the evolution of variable cycle engines，focusing on the evolution of target function and struc?
tural schemes of adjusting mechanisms. The development history，functional classification and design requirements of adjusting mecha?
nisms are systematically reviewed. In terms of structure design，the overall requirements can be summarized as low leakage rate，high con?
trolling precision，fast response and reliable installation. Further consideration should be given to the challenges and constraints intro?
duced by high thermal and mechanical load，and compact layout of advanced aeroengines. In terms of simulation analysis，the main con?
cern of fluid-structure interaction analysis lies on the avoidance of grid distortion and the maintenance of computational convergence. Ef?
forts should be spent on the evaluation of the influence of complex geometric features，structural flexibility，large spatial dimension and
significant transient features. Dynamics simulation methods should be developed to quantify the impact of key components' flexibility-in?
duced deformation，assembly clearance，dimensional tolerance，and transmission friction on mechanism jamming and adjustment accura?
cy. Furthermore，breakthroughs in the reproduction of thermal and mechanical load during transient adjustment processes，are required to
realize the fault location and error attribution of the adjustment mechanism. The research is referable for the design of the adjusting mecha?
nism for variable cycle engines，specifically on the related theories，methods and experimental techniques. |
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