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/

  • Supplemental Notes:
    • Paper 700037
  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Beauvais, F N
  • Publication Date: 1970-1

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Filing Info

  • Accession Number: 00223254
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 17 1970 12:00AM