EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book The Statistical Study of Atmospheric Turbulence by Flight Measurements

Download or read book The Statistical Study of Atmospheric Turbulence by Flight Measurements written by George Robert Chippendale and published by . This book was released on 1951 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Measurements of the Statistical Properties of Atmospheric Turbulence at Altitudes Below 1000 Feet

Download or read book Measurements of the Statistical Properties of Atmospheric Turbulence at Altitudes Below 1000 Feet written by D. G. Gould and published by 1973.. This book was released on 1973 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measured statistical properties of the three components of turbulence are presented for research flights at four altitudes below 1000 feet over flat terrain and two altitudes below 1000 feet over hilly terrain. The measured power spectral density distributions were closely approximated by the von Karman spectral shape. The derived scales of the three components were all about the same, being approximately proportional to height over the flat terrain. The derived scales at the higher altituded appeared to be related to the terrain a considerable distance up-wind from the track along which the measurements were made. (Author Modified Abstract).

Book Atmospheric Turbulence Measurements Obtained from Airplane Operations at Altitudes Between 20 000 and 75 000 Feet for Several Areas in the Northern Hemisphere

Download or read book Atmospheric Turbulence Measurements Obtained from Airplane Operations at Altitudes Between 20 000 and 75 000 Feet for Several Areas in the Northern Hemisphere written by Thomas L. Coleman and published by . This book was released on 1960 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Turbulence in the Free Atmosphere

Download or read book Turbulence in the Free Atmosphere written by N. Vinnichenko and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulence-the randomly disordered movement of volumes of air of widely varying size-is one of the characteristic features of atmospheric air flows; its investigation is essential for the solution of several theoretical and practical problems. Until recently, owing to experimental difficulties, research on turbu lence was confmed mainly to the lower half of the troposphere. Theoretical investigations have consequently been based on these data. The rapid development of high-altitude aviation and cases of aircraft encoun tering hazardous turbulence led to a sharp intensification of research on turbu lence in the atmosphere up to 10-12 km, and subsequently at greater altitudes. Such research was confined initially to the characterization of the frequency of occurrence of gusts of different speeds, their relation to altitude, geographical conditions, time of day and year, and so on. At the end of the fifties, when the required measuring equipment and experimental techniques had been developed, it became possible to investigate the complete statistical characteristics of turbu lence: the spectral densities of the velocity fluctuations of air flows, structure functions, etc. These data stimulated the further development of theory related to the specific conditions of the free atmosphere.

Book Atmospheric Turbulence Simulation Techniques with Application to Flight Analysis

Download or read book Atmospheric Turbulence Simulation Techniques with Application to Flight Analysis written by Show-Tien Wang and published by . This book was released on 1980 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book Low Altitude Atmospheric Turbulence LO LOCAT Phase III Interim Report

Download or read book Low Altitude Atmospheric Turbulence LO LOCAT Phase III Interim Report written by K. R. Monson and published by . This book was released on 1969 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this report describe accomplishments during the first half of the Low-Level Critical Air Turbulence (LO-LOCAT) Phase III program. Data that were obtained during flight over routes near McConnell Air Force Base, Kansas, and Edwards Air Force Base, California, are presented. Also included are time histories of some of the larger magnitude gust velocities recorded over the Peterson Field, Colorado route. Approximately 72 hours of low-level (0-1000 feet) turbulence and associated meteorological data recorded from August 16, 1968, through January 8, 1969, are presented. The turbulence environment is analyzed in terms of gust velocity primary peaks, amplitude samples, rms values, maximum values and derived equivalent gusts. Mathematical expressions for turbulence spectra and scale length statistics, and correlations between atmospheric gust velocities and meteorological and geophysical phenomena are shown. The most predominant characteristics of these data are the increases in rms values, scale lengths, Taylor micro scales and maximum gust values as compared to the LO-LOCAT Phases I and II data. These differences are attributed to the increased speed of the Phase III airplane which is providing a better definition of the longer wavelengths of atmospheric turbulence. This report consists of two volumes. Volume I contains a discussion of data acquisition and quality, along with a preliminary analysis of turbulence and meteorological data.

Book Aviation Turbulence

Download or read book Aviation Turbulence written by Robert Sharman and published by Springer. This book was released on 2016-06-27 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anyone who has experienced turbulence in flight knows that it is usually not pleasant, and may wonder why this is so difficult to avoid. The book includes papers by various aviation turbulence researchers and provides background into the nature and causes of atmospheric turbulence that affect aircraft motion, and contains surveys of the latest techniques for remote and in situ sensing and forecasting of the turbulence phenomenon. It provides updates on the state-of-the-art research since earlier studies in the 1960s on clear-air turbulence, explains recent new understanding into turbulence generation by thunderstorms, and summarizes future challenges in turbulence prediction and avoidance.

Book Airplane Measurements of Atmospheric Turbulence for Altitudes Between 20 000 and 55 000 Feet Over the Western Part of the United States

Download or read book Airplane Measurements of Atmospheric Turbulence for Altitudes Between 20 000 and 55 000 Feet Over the Western Part of the United States written by Thomas L. Coleman and published by . This book was released on 1957 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A sample of data on atmospheric turbulence has been obtained from NACA VGH records taken on Lockheed U-2 airplanes during research flights covering approximately 40,000 miles for altitudes between 20,000 and 55,000 feet over the western part of the United States. An analysis of these data has indicated that the intensity, amount, and extent of atmospheric turbulence is in good agreement with earlier measurements obtained over England and Western Europe. In comparison with past estimates of average turbulence conditions over the United States, the results of this investigation, in general, indicate somewhat lower gust frequencies and lower gust intensities.

Book Measurement and Analysis of Low Altitude Atmospheric Turbulence Obtained Using a Specially Instrumented Gnat Aircraft

Download or read book Measurement and Analysis of Low Altitude Atmospheric Turbulence Obtained Using a Specially Instrumented Gnat Aircraft written by G. W. Foster and published by . This book was released on 1987 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailed measurements of atmospheric turbulence made by a specially instrumented Gnat aircraft at altitudes below one thousand feet over a variety of terrains are described. A programme of flying yielded about 400 runs for which time histories of the three components of turbulence are available. These runs are analysed to give parameters which summarize the statistical characteristics of the turbulence encountered. A very strong relationship between two parameters from the Statistical Discrete Gust analysis technique and one from the Power Spectral Density technique is identified.

Book Dynamic Response of Airplanes to Atmospheric Turbulence Including Flight Data on Input and Response

Download or read book Dynamic Response of Airplanes to Atmospheric Turbulence Including Flight Data on Input and Response written by John C. Houbolt and published by . This book was released on 1964 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coordinated account of flight measurements of random atmospheric turbulence, of calculated and experimentally determined airplane transfer functions, and of analytical procedures for determining output responses is given based on power spectral techniques. Implications of these techniques for load prediction and for design are discussed, and brief review of basic procedures and mathematics involved is also included.

Book Preliminary Measurements of Atmospheric Turbulence at High Altitude as Determined from Acceleration Measurements on Lockheed U 2 Airplane

Download or read book Preliminary Measurements of Atmospheric Turbulence at High Altitude as Determined from Acceleration Measurements on Lockheed U 2 Airplane written by Thomas L. Coleman and published by . This book was released on 1957 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of a sample of turbulence data obtained from VGH records taken on Lockheed U-2 airplanes during research flight up to 55,000 feet over England and Western Europe has indicated substantial reductions in the number and intensity of gusts with increasing altitude. These results on the variation of atmospheric turbulence over England and Western Europe were found to be in overall agreement with previous turbulence data obtained from airplane- and balloon-borne instruments over the United States.