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Optimization of SST Aircraft Configurations

#1170


Optimization of 3-D Components and Integrated Configurations of Supersonic Aircraft

Tech Area / Field

  • SAT-AER/Aeronautics/Space, Aircraft and Surface Transportation

Status
3 Approved without Funding

Registration date
25.12.1997

Leading Institute
Central Aerodynamic Institute, Russia, Moscow reg., Zhukovsky

Collaborators

  • Japan Aircraft Development Corporation, Japan, Tokyo\nPurdue University, USA, IN, West Lafayette\nDaimlerChrysler Aerospace (Satellites), Germany, Friedrichshafen\nONERA, France, Chatillon

Project summary

Objectives

The further development of high speed aviation is connected with the creation of economically justified and ecologically acceptable transport and civil supersonic aircraft of second generation. One of the topical problems in the development of such an aircraft is the aerodynamic optimization of its configuration. In the Project the solution of this problem will be obtained on the basis of analytical, numerical and experimental investigations on optimization of supersonic aircraft and their components at high and moderate supersonic speeds as far as transonic speeds.

New possibilities of optimization the supersonic aircraft configuration are supposed to investigate using


- rational choice of aircraft components (wing, body, nacelle)
- favourable interference between aircraft components
- optimization of the total aircraft configuration including airframe-engine integration.

Technical approach

Both analytical methods and numerical methods of optimization will be used in solving the variation problems. Together with the aerodynamic constraints (namely, lift, balance, store of stability) and different kinds of geometrical constraints, some constraints on the heat fluxes to the aircraft surface are also supposed to be taken into account. The previously formulated hypersonic and transonic area rules will be further developed. The testing experiments in aerodynamic tunnels are supposed to carry out.

The full Euler equations and full Navier - Stokes equations will be used in the Project as far as their asymptotic models - thin shock layer and boundary layer. A number of important physical phenomena will be included in the analysis such as laminar- turbulent transition, viscous - inviscid interaction, equilibrium and nonequilibrium real gas effects, shock waves interaction and shock wave -boundary layer interaction, high - entropy effects and others.

Anticipated results

During the project realization it is suggested to perform a large amount of theoretical, numerical and experimental investigations. As a result will be elaborated


- new methods of aerodynamic optimization
- algorithms and programs for numerical calculation and optimization
- methodology of recalculation the wind tunnel aerodynamic characteristics to the natural conditions and will be obtained
- new data on the optimum shapes of aircraft elements and integrated configurations
- data of parametrical calculations the flow field and aerodynamic characteristics of integrated aircraft schemes
- experimental data on favourable interference and integration in aerodynamic configurations.

Scientific and commercial significance

The project realization will result in a new level of knowledge about the fundamental properties of supersonic flow and optimum shapes of complex bodies. The detailed examination of possibilities to improve the characteristics of integrated aircraft configurations and their components at the conditions close to real, after the experimental verification, will allow to formulate practical recommendations on using the effective methods of optimization in the development of advanced supersonic and transatmosphere civil and transport aircraft.

The realization of these recommendations will lead to the increase of fuel efficiency and to the reduction of specific mass for such an aircraft. Together with the economy of fuel, this permits the significant reduction of damage influence of aircraft engine pollutions on the atmosphere.

Preliminary investigations made in TsAGI in the scope of scientific directions involved justify that they are advanced and fruitful.

The collaborators from scientific - research institutes, private firms and companies and also experts from USA, European Community, Norway, Japan, South Korea are invited to participate in the project.

Potential role of foreign collaborators

The nonfinancial participation of foreign collaborators is suggested in the coordination of working plans, information exchange, discussion of investigation methods, results obtained and possible directions of their practical application and further development.


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