NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
An investigation of drag reduction for a standard truck with various modificationsA wind tunnel investigation was conducted to determine the influence of several physical variables on the aerodynamic drag of a standard truck model. The physical variables included: a cab mounted air deflector; a boattail on the rear of the cargo compartment; flow-vanes on the front of the cargo compartment; and a forebody fairing over the cab. Tests were conducted at yaw angles (relative wind angle) of 0, 5, 10, 20, and 30 degrees and Reynolds numbers of 3.4 x 100,000 to 6.1 x 100,000 based upon the equivalent diameter of the vehicles. The forebody fairing and the flow-vane with the closed bottom were very effective in improving the flow over the forward part of the cargo compartment. The forebody fairing provided a calculated fuel saving of 5.6 liters per hour (1.5 gallons per hour) over the baseline configuration for a ground speed of 88.6 km/hr (55 mph) in national average winds.
Document ID
19810014507
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Muirhead, V. U. (Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Date Acquired
September 4, 2013
Publication Date
May 1, 1981
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-163107
KU-FRL-406-2
Accession Number
81N23040
Funding Number(s)
CONTRACT_GRANT: NSG-4023
PROJECT: RTOP 141-20-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available