Abstract
Fundamental features of aerodynamic interference and integration of airframes and air-breathing jet engines for high-speed flight vehicles are studied within the framework of supersonic small perturbation theory. Both the influence of airframe components on air intakes performance and influence of intakes on vehicle external aerodynamics are under consideration. Analytical relations and specific examples show that significant favorable interference between airframes and air intakes can be realized by using preliminary compression of the flow in front of intakes at flight Mach numbers exceeding approximately 3.
Highlights
Effective airframe/propulsion integration is one of the principal features of advanced aerodynamic configurations used in aerodynamic design of supersonic flight vehicles with air-breathing jet engines, especially for high supersonic speeds exceeding Mach number 3
If some of the vehicle airframe components are used as preliminary stages of flow compression in front of intakes, their effect on intake performance appears in growth of both the intake mass flow rate and total pressure recovery coefficients
The study has confirmed ability of using theoretical approaches based on small perturbation theory to assist researchers in the study of fundamental relationships inherent in airframe/propulsion aerodynamic interference and integration
Summary
Effective airframe/propulsion integration is one of the principal features of advanced aerodynamic configurations used in aerodynamic design of supersonic flight vehicles with air-breathing jet engines, especially for high supersonic speeds exceeding Mach number 3. If the intake is located in a disturbed flow, significant part of the drag force acting on the airframe surfaces providing flow preliminary compression before intakes could be excluded from external aerodynamic forces acting on an aircraft and considered as internal force which acts on the flow stream-tube passing through an engine.
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