AERODYNAMIC INPUTS TO A PARKED VEHICLE CAUSED BY A PASSING BUS
ONE-TENTH-SCALE-MODEL TESTS WERE CARRIED OUT TO STUDY THE AERODYNAMIC FORCES ACTING ON A STATIONARY CAR CLOSELY PASSED BY A BUS AT HIGH SPEEDS. THE TESTS WERE DESIGNED TO SIMULATE CONDITIONS ON A EXPRESSWAYS WHERE DRIVERS ENCOUNTERING PROBLEMS USUALLY PARK THEIR VEHICLES ON THE HARD SHOULDER CLOSE TO THE OUTER LANE. TO SIMULATE THE PASSING PROBLEM, A PARKED STATION WAGON IN THE LEVEL POSITION, AND WITH EACH WHEEL JACKED UP, WAS MOUNTED ON A STING-TYPE BALANCE CAPABLE OF MEASURING AERODYNAMIC FORCES AND MOMENTS. A TRACK WAS DEVELOPED TO CONTROL THE PATH OF THE BUS AS IT PASSED THE CAR. THE BUS MODEL WAS PROPELLED BY A CATAPULT ARRANGEMENT. AERODYNAMIC COMPONENTS MEASURED WERE: LIFT, DRAG, SIDE FORCE, AND PITCHING, ROLLING, AND YAWING MOMENTS. OF THESE, SIDE FORCE AND YAWING MOMENTS WERE SHOWN TO BE MOST IMPORTANT. THE INFLUENCE OF JACKING-UP WAS FOUND TO BE NEGLIGIBLE. TO GIVE AN IMPRESSION OF THE ACTUAL SITUATION, THE COEFFICIENTS HAVE BEEN CONVERTED TO FULL-SCALE FORCES AND MOMENTS WITH THE BUS PASSING AT 70 M.P.H. /AUTHOR/
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Supplemental Notes:
- Paper 700037
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- Beauvais, F N
- Publication Date: 1970-1
Media Info
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Serial:
- Automobile Abstracts /UK/
- Publisher: Society of Automotive Engineers (SAE)
Subject/Index Terms
- TRT Terms: Aerodynamic lift; Aerodynamics; Buses; Drag; High speed ground transportation; High speed vehicles; Parking; Passing; Pitch (Dynamics); Rolling; Simulation; Speed; Yaw
- Uncontrolled Terms: Lateral loads; Lifts; Model tests; Parked vehicles
- Subject Areas: Highways; Public Transportation; Railroads; Safety and Human Factors;
Filing Info
- Accession Number: 00223254
- Record Type: Publication
- Files: TRIS
- Created Date: Aug 17 1970 12:00AM