A Non-gaussian Turbulence Simulation PDF Download
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Author: Paul M. Reeves
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 80
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Book Description
A comparison of the statistical properties of low altitude atmospheric turbulence and the characteristics of presently used simulation techniques shows that these techniques do not satisfactorily account for the non-Gaussian nature of turbulence. A non-Gaussian turbulence simulation, intended to be used in conjunction with piloted flight simulators, is developed. The simulation produces three simultaneous random processes which represent the three orthogonal gust components. The probability distribution of each component is characterized by a modified Bessel function. The rms intensity and scale length of each component are independent parameters. A general method of introducing cross spectra between components is demonstrated. The multiplication of independent random processes is used to generate each of the gust components. Gaussian white noise generators, analog multipliers, and linear filters are used throughout the simulation. A complete analog circuit diagram is presented. (Author).
Author: Paul M. Reeves
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 80
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Book Description
A comparison of the statistical properties of low altitude atmospheric turbulence and the characteristics of presently used simulation techniques shows that these techniques do not satisfactorily account for the non-Gaussian nature of turbulence. A non-Gaussian turbulence simulation, intended to be used in conjunction with piloted flight simulators, is developed. The simulation produces three simultaneous random processes which represent the three orthogonal gust components. The probability distribution of each component is characterized by a modified Bessel function. The rms intensity and scale length of each component are independent parameters. A general method of introducing cross spectra between components is demonstrated. The multiplication of independent random processes is used to generate each of the gust components. Gaussian white noise generators, analog multipliers, and linear filters are used throughout the simulation. A complete analog circuit diagram is presented. (Author).
Author:
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 164
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Book Description
Author: G.A.J. van de Moesdijk
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Paul M. Reeves
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 260
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Book Description
Author: C. J. Jansen
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Author: G.A.J. van de Moesdijk
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Show-Tien Wang
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 180
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Book Description
Statistical modeling of atmospheric turbulence is discussed. The statistical properties of atmospheric turbulence, in particular the probability distribution, the spectra, and the coherence are reviewed. Different atmospheric turbulence simulation models are investigated, and appropriate statistical analyses are carried out to verify their validity. The models for simulation are incorporated into a computer model of aircraft flight dynamics. Statistical results of computer simulated landings for an aircraft having characteristics of a DC-8 are reported for the different turbulence simulation techniques. The significance of various degrees of sophistication in the turbulence simulation techniques on the landing performance of the aircraft is discussed.
Author: Paul M. Reeves
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 260
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Book Description
Author: Arkady Tsinober
Publisher: Springer Science & Business Media
ISBN: 9400771800
Category : Technology & Engineering
Languages : en
Pages : 171
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Book Description
This book critically reexamines what turbulence really is, from a fundamental point of view and based on observations from nature, laboratories, and direct numerical simulations. It includes critical assessments and a comparative analysis of the key developments, their evolution and failures, along with key misconceptions and outdated paradigms. The main emphasis is on conceptual and problematic aspects, physical phenomena, observations, misconceptions and unresolved issues rather than on conventional formalistic aspects, models, etc. Apart from the obvious fundamental importance of turbulent flows, this emphasis stems from the basic premise that without corresponding progress in fundamental aspects there is little chance for progress in applications such as drag reduction, mixing, control and modeling of turbulence. More generally, there is also a desperate need to grasp the physical fundamentals of the technological processes in which turbulence plays a central role.
Author: John Altnow Dutton
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 292
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Book Description
