Aircraft Drag Prediction and Reduction. Addendum 1

Aircraft Drag Prediction and Reduction. Addendum 1
Author:
Publisher:
Total Pages: 34
Release: 1986
Genre:
ISBN:

Download Aircraft Drag Prediction and Reduction. Addendum 1 Book in PDF, Epub and Kindle

The accurate prediction of aircraft aerodynamic drag is a generally recognized and respected problem. So is the accurate measurement of drag in the wind tunnel that, eventually, forms the basis for full scale drag prediction. In the past 15 years Computational Fluid Dynamics (CFD) has emerged as an additional and complementary tool for aerodynamic design and analysis. The purpose of this lecture is to review and comment on its role as a drag prediction and analysis tool. The aerodynamic design process of aircraft is characterized by a sequence of design and analysis cycles. In each cycle a (further) reduction of drag will, generally, be one, but not the only objective. Identification of the source of an unacceptably or undesirably high drag level or drag variation with lift or Mach number is a prerequisite for a successful drag reduction program. Identification of drag sources may follow different approaches. The classical or phenomenological one is based on the availability of overall force (wind tunnel) data only, in combination with simple, semi-empirical theory. CFD, as we shall see later, offers possibilities for a more physically/analytically oriented approach in which the various contributions to drag are distinguished by the underlying physical mechanisms rather than by the observed aerodynamic force variation phenomena. It will also be demonstrated that, in spite of its current shortcomings, CFD is a powerful tool for drag diagnostics. The final part of the lecture contains a discussion on computational drag minimization.

Personal Aircraft Drag Reduction

Personal Aircraft Drag Reduction
Author: Bruce H. Carmichael
Publisher:
Total Pages: 230
Release: 2000
Genre: Drag (Aerodynamics)
ISBN:

Download Personal Aircraft Drag Reduction Book in PDF, Epub and Kindle

AIRCRAFT DRAG PREDICTION AND REDUCTION.

AIRCRAFT DRAG PREDICTION AND REDUCTION.
Author: NATO. ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT.
Publisher:
Total Pages: 100
Release:
Genre:
ISBN:

Download AIRCRAFT DRAG PREDICTION AND REDUCTION. Book in PDF, Epub and Kindle

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports
Author:
Publisher:
Total Pages: 700
Release: 1995
Genre: Aeronautics
ISBN:

Download Scientific and Technical Aerospace Reports Book in PDF, Epub and Kindle

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Introduction to Flight Testing

Introduction to Flight Testing
Author: James W. Gregory
Publisher: John Wiley & Sons
Total Pages: 356
Release: 2021-05-17
Genre: Technology & Engineering
ISBN: 111894982X

Download Introduction to Flight Testing Book in PDF, Epub and Kindle

Introduction to Flight Testing Introduction to Flight Testing Provides an introduction to the basic flight testing methods employed on general aviation aircraft and unmanned aerial vehicles Introduction to Flight Testing provides a concise introduction to the basic flight testing methods employed on general aviation aircraft and unmanned aerial vehicles for courses in aeronautical engineering. There is particular emphasis on the use of modern on-board instruments and inexpensive, off-the-shelf portable devices that make flight testing accessible to nearly any student. This text presents a clear articulation of standard methods for measuring aircraft performance characteristics. Topics covered include aircraft and instruments, digital data acquisition techniques, flight test planning, the standard atmosphere, uncertainty analysis, level flight performance, airspeed calibration, stall, climb and glide, take-off and landing, level turn, static and dynamic longitudinal stability, lateral-directional stability, and flight testing of unmanned aircraft systems. Unique to this book is a detailed discussion of digital data acquisition (DAQ) techniques, which are an integral part of modern flight test programs. This treatment includes discussion of the analog-to-digital conversion, sample rate, aliasing, and filtering. These critical details provide the flight test engineer with the insight needed to understand the capabilities and limitations of digital DAQ. Key features: Provides an introduction to the basic flight testing methods and instrumentation employed on general aviation aircraft and unmanned aerial vehicles. Includes examples of flight testing on general aviation aircraft such as Cirrus, Diamond, and Cessna aircraft, along with unmanned aircraft vehicles. Suitable for courses on Aircraft Flight Test Engineering. Introduction to Flight Testing provides resources and guidance for practitioners in the rapidly-developing field of drone performance flight test and the general aviation flight test community.