Store Separation At Transonic Speeds

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Store Separation At Transonic Speeds

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Author : Stephen S. Stahara
language : en
Publisher:
Release Date : 1982

Store Separation At Transonic Speeds written by Stephen S. Stahara and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.

A review is provided of the state of the art of methods currently employed for predicting store separation at transonic speeds. Both experimentally- and theoretically-based methods are surveyed. A discussion of the various underlying aspects of the store separation problem, in particular, those most crucial at transonic speeds is provided. Future developments required for these methods to become usable in a design mode are identified, and a possible next plateau of theoretical modeling development is suggested. (Author).

Stores Separation Characteristics From A Generic Bay At Transonic Flight Speeds

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Author : Robert S. Turzanski
language : en
Publisher:
Release Date : 1989

Stores Separation Characteristics From A Generic Bay At Transonic Flight Speeds written by Robert S. Turzanski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

Store Separation

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Author : Bertha M. Ryan
language : en
Publisher:
Release Date : 1973

Store Separation written by Bertha M. Ryan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Weapons systems categories.

Experience In The Use Of Computational Aerodynamics To Predict Store Release Characteristics

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Author :
language : en
Publisher:
Release Date : 2000

Experience In The Use Of Computational Aerodynamics To Predict Store Release Characteristics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.

In the early days, store separation tests were conducted in a hit or miss fashion - the stores would he dropped from the aircraft at gradually increasing speeds until the store came close to or sometimes actually hit the aircraft. In some cases, this led to loss of the aircraft, and made some test pilots reluctant to participate in store separation flight test programs. During the 1960's, the Captive Trajectory System (CTS) method for store separation wind tunnel testing was developed. The CTS provided a considerable improvement over the hit or miss method, and became widely used in aircraft/store integration programs prior to flight-testing. However, since fairly small-scale models had to be used in the wind tunnel tests, in many cases, the wind tunnel predictions did not match the flight test results. No mechanism was then in place to resolve the wind tunnel/flight test discrepancies. During this same timeframe, Computational Fluid Dynamics (CFD) had finally matured to the point of providing a trajectory solution for a store in an aircraft flowfield. However, Since the computational tools were necessarily (due to computer resource limitations) limited to linear techniques, and since most store separation problems occur at transonic speeds, these tools had limited application. Recent advances in computer resources have greatly improved the capability of CFD to predict store release characteristics. Instead of using linear or approximate schemes, time dependent Euler and Navier Stokes trajectories could he computed in a reasonable timeframe. Three international CFD challenges, held during the last decade of the 20th century, have shown that CFD cannot only match wind tunnel test data, but also predict flight test trajectories for complex stores at transonic speeds. It appears that CFD has matured to the point that it can be usefully integrated into aircraft/store compatibility programs.

Store Separation

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Author : Leon H. Schindel
language : en
Publisher:
Release Date : 1975

Store Separation written by Leon H. Schindel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Aerodynamics, Supersonic categories.

This AGARDograph is a systematic collection of experimental results for use of engineers and designers, limited to externally carried, unpowered, unguided stores. In the sections dealing with store trajectories, the physical situation is described, the method of solution is indicated, and the final results are presented. Emphasis is on store motion in traversing the parent aircraft flowfield, with criteria for safe separation and methods of calculating flight path. Windtunnel test techniques are described, and some information on flight testing given. Analytical treatment is compared with flight and tunnel results. There are brief mentions of ejection systems and the effect of stores on aircraft performance.

Store Separation Testing Techniques At The Arnold Engineering Development Center

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Author : J. B. Carman (Jr.)
language : en
Publisher:
Release Date : 1980

Store Separation Testing Techniques At The Arnold Engineering Development Center written by J. B. Carman (Jr.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Airplanes, Military categories.

This report describes the current captive trajectory support (CTS) hardware, system operation, and the captive trajectory applications program for the Aerodynamic Wind Tunnel (4T). Also included are brief descriptions of additional CTS applications and some guidelines for potential users of the system.

Cavity Unsteady Pressure Measurements At Subsonic And Transonic Speeds

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Author : Maureen B. Tracy
language : en
Publisher:
Release Date : 1997

Cavity Unsteady Pressure Measurements At Subsonic And Transonic Speeds written by Maureen B. Tracy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Aerodynamics, Transonic categories.

Study Of Flow Fields And Store Forces In Close Proximity To A Triple Ejection Rack At Transonic Speeds

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Author : Frederick K. Goodwin
language : en
Publisher:
Release Date : 1981

Study Of Flow Fields And Store Forces In Close Proximity To A Triple Ejection Rack At Transonic Speeds written by Frederick K. Goodwin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.

The information presented in this paper shows what parent aircraft effects are important when determining the forces and moments acting on a store in close proximity to a triple ejection rack. The large gradients in the store forces and moments which exist near the carriage position are demonstrated. Areas are shown in which improvements to the AFFDL/Nielsen subsonic store separation computer program are required if the launch dynamics of a store released from such a configuration are to be accurately predicted. (Author).

Unsteady Aerodynamic Effects On External Store Separation Characteristics

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Author : Stanford University. Department of Aeronautics and Astronautics
language : en
Publisher:
Release Date : 1967

Unsteady Aerodynamic Effects On External Store Separation Characteristics written by Stanford University. Department of Aeronautics and Astronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Aerodynamics categories.

A preliminary study is reported on certain aspects of the problem of external stores separating from a carrier vehicle. A search of the available literature resulted in the identification of some 23 documents which were strongly relevant to the subject of investigation. These are listed, and summaries are given on several of the most important. Two-dimensional idealizations of store configurations were numerically analyzed to determine the initial behavior of pitch angle and vertical separation following release. Based on quasi-steady airloads, important characteristics of their trajectories are given for 17 combinations of system parameters. Trajectory calculations based upon unsteady airloads were made using three sets of parameters chosen for high, nominal, and low pitch oscillation frequencies (as compared with the results from the quasi-steady calculations). These unsteady airload results agreed fairly well in translational history with quasi-steady counterparts, but increasing frequency led to increased disagreement between the predictions of pitch behavior.

A Summary Of Nasa Data Relative To External Store Separation Characteristics

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Author : Linwood W. McKinney
language : en
Publisher:
Release Date : 1968

A Summary Of Nasa Data Relative To External Store Separation Characteristics written by Linwood W. McKinney and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Bomb racks categories.