scholarly journals Low-boom low-drag solutions through the evaluation of different supersonic business jet concepts

2019 ◽  
Vol 124 (1271) ◽  
pp. 76-95
Author(s):  
Y. Sun ◽  
H. Smith
Keyword(s):  
Function Method ◽  
Near Field ◽  
Wave Drag ◽  
Sonic Boom ◽  
Parameter Method ◽  
Volume Distribution ◽  
Conceptual Level ◽  
Aerodynamic Analysis ◽  
Business Jet ◽  
Numerical Approaches

ABSTRACTThis paper evaluates six supersonic business jet (SSBJ) concepts in a multidisciplinary design analysis optimisation (MDAO) environment in terms of their aerodynamics and sonic boom intensities. The aerodynamic analysis and sonic boom prediction are investigated by a number of conceptual-level numerical approaches. The panel method PANAIR is integrated to perform automated aerodynamic analysis. The drag coefficient is corrected by the Harris wave drag formula and form factor method. For sonic boom prediction, the near-field pressure is predicted through the Whitham F-function method. The F-function is decomposed to the F-function due to volume and the F-function due to lift to investigate the separate effect on sonic boom. The propagation method for the near-field signature in a stratified windy atmosphere is the waveform parameter method. In this research, using the methods described and publically available data on the concepts, the supersonic drag elements and sonic boom signature due to volume distribution and lift distribution are analysed. Based on the analysis, low-boom and low-drag design principles are identified.

scholarly journals Conceptual design of sonic boom stealth supersonic transports

2022 ◽  
Author(s):  
Yicheng Sun ◽  
Howard Smith
Keyword(s):  
Conceptual Design ◽  
Aircraft Design ◽  
Design Model ◽  
Sonic Boom ◽  
Volume Distribution ◽  
Design Environment ◽  
Supersonic Aircraft ◽  
Business Jet ◽  
Multidisciplinary Perspective ◽  
Aircraft Conceptual Design

AbstractThis paper introduces a supersonic transport aircraft design model developed in the GENUS aircraft conceptual design environment. A conceptual design model appropriate to supersonic transports with low-to-medium-fidelity methods are developed in GENUS. With this model, the authors reveal the relationship between the sonic boom signature and the lift and volume distributions and the possibility to optimise the lift distribution and volume distribution together so that they can cancel each other at some region. A new inspiring design concept—sonic boom stealth is proposed by the authors. The sonic boom stealth concept is expected to inspire the supersonic aircraft designers to design low-boom concepts through aircraft shaping and to achieve low ground impacts. A family of different classes of supersonic aircraft, including a single-seat supersonic demonstrator (0.47 psf), a 10-passenger supersonic business jet (0.90 psf) and a 50-seat supersonic airliner (1.02 psf), are designed to demonstrate the sonic boom stealth design principles. Although, there are challenges to balance the volume with packaging and control requirements, these concepts prove the feasibility of low-boom low-drag design for supersonic transports from a multidisciplinary perspective.

scholarly journals Specialized CFD Grid Generation Methods for Near-Field Sonic Boom Prediction

2014 ◽  
Author(s):  
Michael A. Park ◽  
Richard L. Campbell ◽  
Alaa A. Elmiligui ◽  
Susan E. Cliff ◽  
Sudheer Nayani
Keyword(s):  
Near Field ◽  
Grid Generation ◽  
Sonic Boom

scholarly journals Efficient Near-Field to Mid-Field Sonic Boom Propagation Using a High-Order Space Marching Method

2019 ◽  
Author(s):  
Jeffrey A. Housman ◽  
Gaetan K. Kenway ◽  
James C. Jensen ◽  
Cetin C. Kiris
Keyword(s):  
Near Field ◽  
High Order ◽  
Sonic Boom ◽  
Marching Method

The Testimony and Application of Inequality Cauchy-Schwarz

2014 ◽  
Vol 687-691 ◽  
pp. 1223-1226
Author(s):  
Qi Shen
Keyword(s):  
Integral Inequality ◽  
Function Method ◽  
Integral Function ◽  
Parameter Method ◽  
Definite Integral ◽  
Double Integral ◽  
Upper Limit

This paper discusses the form of inequality Cauchy-Schwarz in the field of calculus, giving the different methods of proof, which includes Parameter method, variable upper limit integral function method, the double integral and definite integral definition method. What’s more, through a series of examples, it also reflects that the inequality Cauchy-Schwarz can make the process of proving the inequality more simple while certifying the Integral inequality.

Numerical study of the of sonic boom near-field

2019 ◽  
Author(s):  
P. A. Mishchenko ◽  
T. A. Kiseleva
Keyword(s):  
Numerical Study ◽  
Near Field ◽  
Sonic Boom

A review of supersonic business jet design Issues

2007 ◽  
Vol 111 (1126) ◽  
pp. 761-776 ◽  
Author(s):  
H. Smith
Keyword(s):  
Global Economy ◽  
Aircraft Design ◽  
Flight Test ◽  
Specific Aspect ◽  
Air Travel ◽  
Sonic Boom ◽  
Enabling Technologies ◽  
Business Jet ◽  
Depth Analysis ◽  
Theoretical And Numerical Analysis

Abstract Key issues relating to the Supersonic Business Jet (SBJ) concept are reviewed with the intent to assess the readiness of enabling technologies and hence the concept itself. The multidisciplinary nature of aircraft design precludes an in-depth analysis of each specific aspect, which could individually be the subject of a separate discipline review, hence an overview is presented. The review looks at the market, environmental issues, with particular reference to the sonic boom phenomenon & solutions, technological issues, including prediction methods, flight testing, systems, certification and interested aerospace companies and design organisations. It is apparent that the need to reduce the sonic boom signature is vital if the vehicle is to be permitted to operate over land and hence be economically viable. It is clear that sonic boom acceptability requirements must be set if resources are to be effectively focused and designs are to converge. Despite this challenge, considerable investment is aimed at de-risking many of the enabling technologies and raising readiness levels. Many technologies are moving beyond theoretical and numerical analysis into the experimental and flight test domains. Collaboration between the civil and military sectors is increasing. Clearly, supersonic air travel is not an efficient means of personal conveyance; however, concerns for the environment are difficult to balance against the ‘value of time’ benefits offered by the SBJ concept. Air travel, of which this is a specialised form, is important to the global economy. Continued effort in the areas of human factors, customer demand and certification & requirements would be beneficial.

Euler code prediction of near-field to midfield sonic boom pressure signatures

1993 ◽  
Vol 30 (6) ◽  
pp. 911-917 ◽  
Author(s):  
M. J. Siclari ◽  
C. M. Darden
Keyword(s):  
Near Field ◽  
Sonic Boom
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