Determination of the Momentum Drag within the Turbojet Engine Laboratory While Operating the J-57-8B Turbojet Engine

Download
Author
Naval Postgraduate School, Monterey, CA.
Aeronautics
Date
1964-09Metadata
Show full item recordAbstract
Limited tests were conducted at the USNPGS Astro /Aeronautical Propulsion
Laboratories to determine the magnitude and variation of the momentum
drag which is developed within turboject engine test chamber
while operating a J-57-8B powerplant. A survey of the aerodynamic characteristics
at the chamber inlet and the calculation of the momentum and
energy interchange at the engine exhaust plane reveal that this restric=
tive drag which penalizes the "indicated" performance of the engine is
approximately 1.07» of the thrust output and varies directly with the
ratio of engine thrust to secondary airflow.
Further tests will be necessary to evaluate the effects of the positioning
of the exhaust augmenter and the variation of the exhaust cooling
water flow rate upon the secondary airflow and the resulting momentum
drag. With the completion of these surveys it is anticipated that
the over-all accuracy of the facility thrust measuring system will be
t 0.50% throughout the thrust range of 1000 to 30,000 lbs.
NPS Report Number
Technical Note No. 64T-6Related items
Showing items related by title, author, creator and subject.
-
Direct observation of oil consumption mechanisms in a production spark ignition engine using fluorescence techniques
Lusted, Roderick M. (Monterey, California. Naval Postgraduate School, 1994);The oil consumption characteristics of a four cylinder, normally aspirated spark-ignition engine were investigated for different piston ring end-gap configurations. A radiotracer was used to perform direct measurement of ... -
DETERMINATION OF EFFECTIVE AVAILABLE PRESSURE OF A ROTATING DETONATION ENGINE
TenEyck, Joshua A. (Monterey, CA; Naval Postgraduate School, 2019-06);Rotating detonation engines (RDEs) offer improved efficiency over conventional ramjet engines due to their decreased combustion chamber size and increased pressure gain across the combustor; however, due to highly transient ... -
Summary report of the turboprop test chamber acceptance tests conducted on 27 April to 8 May 1964
Hardy, H.D.; McConnell, R.E.; Bell, R.W. (Monterey, California. Naval Postgraduate School, 1964);Acceptance testing of the Turboprop Test Chamber was conducted during the weeks of 27 April and 4 May 1964. The tests were conducted by personnel from the Overhaul and Repair Department, Alameda Naval Air Station, from ...