An investigation of the internal and external aerodynamics of cattle trucks. Final Report

Technical Report · Sun May 01 04:00:00 EDT 1983

OSTI ID:5643416

Muirhead, V U

Wind tunnel tests were conducted on a one-tenth scale model of a conventional tractor trailer livestock hauler to determine the air flow through the trailer and the drag of the vehicle. These tests were conducted with the trailer empty and with a full load of simulated cattle. Additionally, the drag was determined for six configurations, of which details for three are documented herein. These are: (1) conventional livestock trailer empty, (2) conventional trailer with smooth sides (i.e., without ventilation openings), and (3) a stream line tractor with modified livestock trailer (cab streamlining and gap fairing). The internal flow of the streamlined modification with simulated cattle was determined with two different ducting systems: a ram air inlet over the cab and NACA submerged inlets between the cab and trailer. The air flow within the conventional trailer was random and variable. The streamline vehicle with ram air inlet provided a nearly uniform air flow which could be controlled. The streamline vehicle with NACA submerged inlets provided better flow conditions than the conventional livestock trailer but not as uniform or controllable as the ram inlet configuration.

• Research Organization: Kansas Univ. Center for Research, Inc., Lawrence (USA)
• OSTI ID: 5643416
• Report Number(s): N-8326760; NASA-CR-170400
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320203* -- Energy Conservation
Consumption
& Utilization-- Transportation-- Land & Roadway
AERODYNAMICS
AIR FLOW
ANIMALS
CATTLE
CONSTRUCTION
DOMESTIC ANIMALS
ENERGY CONSUMPTION
FLUID FLOW
FLUID MECHANICS
FUEL CONSUMPTION
GAS FLOW
MAMMALS
MECHANICS
REYNOLDS NUMBER
RUMINANTS
TRUCKS
TURBULENCE
VEHICLES
VENTILATION
VERTEBRATES