Supersonic Transport Airplane
Multidisciplinary Approach to Preparing the Concept of Second-generation Supersonic Transport Airplane (SST-2) Ensuring Perfect Aerodynamic, High Static/Fatigue Strength, Good Structural Efficiency and Safe Flights
Tech Area / Field
- SAT-AER/Aeronautics/Space, Aircraft and Surface Transportation
8 Project completed
Senior Project Manager
Tyurin I A
Central Aerodynamic Institute, Russia, Moscow reg., Zhukovsky
Project summaryWorks on second-generation supersonic passenger-carrying airplanes SCT are currently conducted by major aircraft companies and research centers of the UK, France, USA and Russia.
TsAGI investigation into potential directions of improving properties of SST-2; being under development in Europe, the USA and Russia has shown possible ways to improve structural efficiency, to increase lifetime, to improve aeroelastic stability characteristics at high lift-to-drag ratio of two-mode SST-2 for M < 1 and M > 1. To simplify the search and the utilization of such ways at the design stage it may be reasonable to carry out this search and to present the results in the form of key SST-2 characteristics.
To investigate into the spectrum of possible decisions for the European supersonic commercial transport airplane ESCT is the aim of the project proposed by the authors. The task of developing highly economic effective ESCT requires multidisciplinary approach, taking into account strength, weight, service life and aeroelastic stability of the structure for search of airplane shape.
There are many parameters whose selection requires such multidisciplinary approach. The greater outer wing sweep angle, reduced airfoil thickness-to-chord ratio, greater aspect ratio being useful in terms of aerodynamics may lead to the airframe structure weight increase and life shortage.
Increasing the supersonic cruise flight Mach number advisable in terms of economics complicates the task of ensuring high static/fatigue strength due to more intensive aerodynamic heating and may result in the replacement of cheap Al-alloys by more expensive Ti-alloys and composites and degrade the airplane economic merit figures.
Having accomplished the project for second generation supersonic passenger-carrying airplane ESCT in ensuring airframe strength with regard for the effect on the structure of elevated temperatures arising in the supersonic flight, the comprehensive strength estimates should be derived including:
- loads for flight and ground segments;
- structural configuration of the airframe and structural elements;
- load-carrying material distribution in the structure;
- structural stress-strain state based on finite-element airframe model in the principal design cases;
- shapes and frequencies of oscillations, as well as characteristics of aeroelasticity.
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