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The obtained results are of interest, for example, from the point of view of estimating the level of noise carried through the gas ducts of a jet engine.
      
Specific impulse losses due to friction and dispersion in a gas-film cooled liquid rocket engine nozzle
      
Numerical simulation of the separation flow on the lateral surface of an aircraft due to interaction between the engine exhaust plume and the external air-stream is carried out on the basis of the full Navier-Stokes equations.
      
The possibility of creating a model flow generating noise spectra characteristic of an internal combustion engine exhaust without combustion processes is demonstrated.
      
Formation of laminar lateral separation caused by a sustainer engine jet
      
The numerical results for the boundary layer in a liquid rocket engine (LRE) nozzle, where compressibility, the temperature factor, and flow acceleration are significant, are presented.
      
Determination of the optimal contour of a supersonic jet engine outlet by the direct method
      
The variational problem of determining the optimal contour of an outlet system consisting of the supersonic jet-engine nozzle and the tail of the flight vehicle is solved by the direct method.
      
The problem of designing the optimal nozzle of a hypersonic ramjet engine for a given isoperimetric condition imposed on the moment and restricted overall dimensions is solved by the method of an indefinite control contour.
      
This regime made it possible to model the motion of individual charged clusters of different charge and size in aircraft engine jets.
      
Optimal-contour design for a plane hypersonic engine output unit with account for the boundary layer, length, outer flow, and ba
      
The direct method of solving the variational problem for determining the optimal contour of a jet engine output unit with account for gas viscosity is developed.
      
Model of Formation of the Electric Current in Aircraft Jet Engine Ducts
      
A possible mechanism of formation of electric currents ("engine currents") in aircraft engine jets (with subsequent charging of the aircraft) is investigated.
      
This mechanism is a result of the presence of electrons and ions at concentrations of 107-1010cm-3 in the gas flow in the engine duct.
      
A general functional dependence of the engine current on the basic dimensionless parameters is obtained on the basis of similarity theory and dimensional analysis.
      
Within the framework of electrical diffusion boundary layer theory a model problem of formation of the maximum possible engine current is formulated.
      
The engine current is qualitatively estimated for real engines and the calculation results are compared with the experimental data obtained under airfield conditions.
      
Dynamics of Sulfate Aerosol Formation in Engine Jets
      
The problem of electric current ("engine current") formation in aircraft jet engine ducts as a result of the development of electrical diffusion boundary layers on the surfaces of the duct and internal engine components is investigated.
      
 

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