Session I.- The Aerodynamic Drag of Cars Current Understanding, Unresolved Problems, and Future Prospects.- References.- Discussion.- The Drag Related Flow Field Characteristics of Trucks and Buses.- References.- Discussion.- Some Effects of Free-Stream Turbulence and the Presence of the Ground on the Flow Around Bluff Bodies.- References.- Discussion.- Session II.- Some General Characteristics and Properties of Three-Dimensional Flow Fields.- Discussion.- Mechanisms of Two and Three-Dimensional Base Drag.- References.- Discussion.- Drag-Reducing Techniques for Axi-symmetric Bluff Bodies.- References.- Discussion.- Session III.- The Effect of Base Slant on the Flow Pattern and Drag of Three-Dimensional Bodies.- References.- Discussion.- Recent Japanese Research on Three-Dimensional Bluff-Body Flows Relevant to Road-Vehicle Aerodynamics.- References.- Discussion.- Interaction Effects on the Drag of Bluff Bodies in Tandem.- References.- Discussion.- Session IV.- Numerical Modeling of Blunt-Body Flows - Problems and Prospects.- References.- Discussion.- Prospects for Numerical Simulation of Bluff-Body Aerodynamics.- References.- Discussion.- General Discussion and Outlook for the Future.- Symposium Wrap-Up.- Participants.
These Proceedings contain the papers and oral discussions presented at the Symposium on AERODYNAMIC DRAG MECHANISMS of Bluff Bodies and Road Vehides held at the General Motors Research Laboratories in Warren, Michigan, on September 27 and 28, 1976. This international, invitational Symposium was the twentieth in an annual series, each one having been in a different technical discipline. The Symposia provide a forum for areas of science and technology that are of timely interest to the Research Laboratories as weIl as the technical community at large, and in which personnel of the Laboratories are actively involved. The Symposia furnish an opportunity for the exchange of ideas and current knowledge between participating research specialists from educational, industrial arid governmental institutions and serve to stimulate future research activity. The present world-wide energy situation makes it highly desirable to reduce the force required to move road vehicles through the atmosphere. A significant amount of the total energy consumed for transportation is expended in overcoming the aerodynamic resistance to motion of these vehicles. Reductions in this aerodynamic drag can therefore have a large impact on ground transportation energy requirements. Although aerodynamic development work on road vehides has been performed for many years, it has not been widely reported or accompanied by much basic research.
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