Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 40
Book Description
Wind-tunnel Investigation of a Flush Airdata System at Mach Numbers from 0.7 to 1.4
Author: Wind Tunnel Investigation of an All Flush Orifice Air Data System for a Large Subsonic Aircraft
Author: Terry J. LarsonPublisher:
ISBN:
Category : Air speed
Languages : en
Pages : 104
Book Description
Scientific and Technical Aerospace Reports
Author: Flush Airdata Sensing (FADS) System Calibration Procedures and Results for Blunt Forebodies
Author: Brent R. CobleighPublisher:
ISBN:
Category : Aeronautical instruments
Languages : en
Pages : 34
Book Description
Blunt-forebody pressure data are used to study the behavior of the NASA Dryden Flight Research Center flush airdata sensing (FADS) pressure model and solution algorithm. The model relates surface pressure measurements to the airdata state. Spliced from the potential flow solution for uniform flow over a sphere and the modified Newtonian impact theory, the model was shown to apply to a wide range of blunt-forebody shapes and Mach numbers. Calibrations of a sphere, spherical cones, a Rankine half body, and the F-14, F/A-18, X-33, X-34, and X-38 configurations are shown. The three calibration parameters are well-behaved from Mach 0.25 to Mach 5.0, an angle-of-attack range extending to greater than 30 deg., and an angle-of-sideslip range extending to greater than 15 deg. Contrary to the sharp calibration changes found on traditional pitot-static systems at transonic speeds, the FADS calibrations are smooth, monotonic functions of Mach number and effective angles of attack and sideslip. Because the FADS calibration is sensitive to pressure port location, detailed measurements of the actual pressure port locations on the flight vehicle are required and the wind-tunnel calibration model should have pressure ports in similar locations. The procedure for calibrating a FADS system is outlined.
NASA Technical Paper
Author: Development of a Flush Airdata Sensing System on a Sharp-nosed Vehicle for Flight at Mach 3 to 8
Author: Mark C. DavisPublisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 28
Book Description
NASA Dryden Flight Research Center has developed a flush airdata sensing (FADS) system on a sharp-nosed, wedge-shaped vehicle. This paper details the design and calibration of a real-time angle-of-attack estimation scheme developed to meet the onboard airdata measurement requirements for a research vehicle equipped with a supersonic-combustion ramjet engine. The FADS system has been designed to perform in flights at speeds between Mach 3 and Mach 8 and at angles of attack between -6° and 12°. The description of the FADS architecture includes port layout, pneumatic design, and hardware integration. Predictive models of static and dynamic performance are compared with wind-tunnel results across Mach and angle-of-attack range. Results indicate that static angle-of-attack accuracy and pneumatic lag can be adequately characterized and incorporated into a real-time algorithm.
Qualitative Evaluation of a Flush Air Data System at Transonic Speeds and High Angles of Attack
Author: Terry J. LarsonPublisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 68
Book Description
Prediction and Validation Technologies of Aerodynamic Force and Heat for Hypersonic Vehicle Design
Author: Min ZhaoPublisher: Springer Nature
ISBN: 9813365269
Category : Technology & Engineering
Languages : en
Pages : 257
Book Description
This book provides an overview of advanced prediction and verification technologies for aerodynamics and aerothermodynamics and assesses a number of critical issues in advanced hypersonic vehicle design. Focusing on state-of-the-art theories and promising technologies for engineering applications, it also presents a range of representative practical test cases. Given its scope, the book offers a valuable asset for researchers who are interested in thermodynamics, aircraft design, wind tunnel testing, fluid dynamics and aerothermodynamics research methods, introducing them to inspiring new research topics.
NASA Scientific and Technical Publications
Author: Government Reports Annual Index
Author: Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 882
Book Description