Title

Dynamic System Studies: Aerodynamic Studies

Date

1956

Index Abstract

Coming Soon

Photo Quality

Not Needed

Report Number

WADC TR 54-250 Part 16

Creator

Saarlas, M.

Krzywoblocki, M.Z.

Corporate Author

University Of Chicago, University of Illinois

Laboratory

Aeronautical Research Laboratory

Extent

54

PB Number

PB121651

Identifier

AD0097261

AD0097261

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(038)-15068

DoD Project

7060

DoD Task

None Given

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

AFAL LTR

Distribution Conflict

Fix

Report Availability

Full text available

Date Issued

1956-09

Abstract

The trajectory of an air vehicle is determined by Newton's laws; it is necessary to know the aerodynamic forces to solve F = ma. The forces are composed of body forces (gravity and thrust) and the surface forces (air reactions) which depend on (1) kinematics (linear and angular velocities u, v, w, p, q, r), (2) geometry (body shape and control surface deflections δa, δe, δr), and (3) properties of the medium (density, pressure, temperature, viscosity, heat conductivity).  No general expressions for the forces are available.  General functional relations and the influence of the independent variables on the force and moment components are discussed.  The usual engineering approach in designing airplanes involves evolution of existing models based on empirical formulae and experience.  Expressions used in simulation are based on Taylor series and text measurements.  It is felt impractical and unnecessary to refine algebraic expressions for the force.  Present efforts are directed toward the electronic solution of the differential equations giving rise to the forces.  The goal is a mechanization of the appropriate equations of fluid motion, continuity, energy and state such as to provide continuous D.C. voltages representing the force and moment components, without the necessity of having exact explicit expressions for them.  Modern trends in fluid dynamics relevant to this goal are discussed.

Publisher

Aeronautical Research Laboratory, Wright Air Development Center, Air Research and Development Command, United States Air Force : Wright-Patterson Air Force Base, OH

Date Modified

Scanned by request 8/6/2018 submitted by Massachusetts Institute of Technology (University - Domestic)

AD Number

AD 97261

Provenance

AFRL/VACA

Type

report

Format

1 online resource