External Drag of Fuselage Side Intakes

Dobson, M. D.; Goldsmith, E. L.

doi:10.2514/3.58944

Cited by 5 publications

(1 citation statement)

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“…The problem of such interactions is the increment of flow instabilities around the external surface of inlet and local flow separation possibility at different locations. As a serious advantage, diverter gap can prevent such interactions for M=1-1.5 if the inlet operates critically 5 . Fig (20) shows the effect of such interactions on the streamlines in a 3D view from front of the inlet.…”

Section: Performance Of Inlet/diverter Configurationmentioning

confidence: 97%

A novel aerodynamic surface for redirecting the boundary layer

Saheby

Huang

Qiao

et al. 2015

33rd AIAA Applied Aerodynamics Conference

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Controlling and redirecting the low-kinetic-energy layers of flow on the fuselage of aircrafts, is one of the most demanding stages in the advanced aerodynamic designs. Among the applications, Inlet/body integration needs the serious considerations to prevent the boundary layer from being swallowed by the inlet entrance. Not only the classic diverters are outclass nowadays, but also the newly used bump surfaces have still faced some problems under the effects of thick boundary layer. In this paper a new concept for highly integrated inlets has been presented. The concept called Ridge, is an aerodynamic surface, involves a vortex and a pressure gap to redirect the boundary layer. The performance of the ridge in redirecting the boundary layer and its flexibility has been proven by numerical simulations for different cases. According to numerical calculations, clean entrance from the boundary layer with a significant reduction in the total cross section area of aircraft has been resulted. The new surface has shown a great potential to integrate or combine with different aerodynamic geometries like external compression surfaces and it can cover a wide range of Mach numbers. This article has focused on the usage of new concept for inlet/body integration. NomenclatureC D = drag coefficient Δe = mechanical energy lose C Dt = flight vehicle forebody drag coefficient β = diversion angle I vis = viscose force increment percentage δ = ridge blade height I D = drag force increment percentage ψ = Yaw angle D p = pressure drag force ω = vorticity D v = viscous drag force v = velocity vector D = total drag force v m = vorticity magnitude h = normal distance from fuselage P t∞ = free stream total pressure HPS = high pressure surface of ridge blade BR = boundary layer removing ability M = Mach number LPS = low pressure surface of ridge blade P = static pressure P t = total pressure R CD = percentage reduction of total drag coefficient R Pt = percentage reduction of total pressure recovery coefficient σ F = viscous drag to pressure drag ratio σ = total pressure recovery coefficient SST = shear stress transport 1 Ph.D student, College of energy and power engineering, 29 Yudao St., Nanjing 210016, china, eiman@nuaa.edu.cn 2 Professor, College of energy and power engineering, 29 Yudao St., Nanjing 210016, china, hgp@nuaa.edu.cn, and AIAA Senior Member 3 Ph.D student, College of energy and power engineering, 29 Yudao St.,

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Section: Performance Of Inlet/diverter Configurationmentioning

confidence: 97%

A novel aerodynamic surface for redirecting the boundary layer

Saheby

Huang

Qiao

et al. 2015

33rd AIAA Applied Aerodynamics Conference

View full text Add to dashboard Cite

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Spillage Drag Measurement with Aid of CFD for Small Supersonic Transport

Ueno¹,

Makino²,

Takaya³

et al. 2017

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCE

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Tradeoffs in Jet Inlet Design: A Historical Perspective

Sóbester

2007

Journal of Aircraft

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The design of the inlet(s) is one of the most demanding tasks of the development process of any gas turbine-powered aircraft. This is mainly due to the multi-objective and multidisciplinary nature of the exercise. The solution is generally a compromise between a number of conflicting goals and these conflicts are the subject of the present paper. We look into how these design tradeoffs have been reflected in the actual inlet designs over the years and how the emphasis has shifted from one driver to another. We also review some of the relevant developments of the jet age in aerodynamics and design and manufacturing technology and we examine how they have influenced and informed inlet design decisions.

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External Drag of Fuselage Side Intakes

Cited by 5 publications

References 0 publications

A novel aerodynamic surface for redirecting the boundary layer

A novel aerodynamic surface for redirecting the boundary layer

Spillage Drag Measurement with Aid of CFD for Small Supersonic Transport

Tradeoffs in Jet Inlet Design: A Historical Perspective

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