Simulation of a Travelling Sonic Boom in a Pyramidal Horn.
Abstract
In order to assess current societal problem associated with the sonic boom, a horn-type simulator was constructed at the Institute for Aerospace Studies, University of Toronto (UTIAL). The simulator horn is in the form of a horizontal concrete pyramid, which is 25 m long and has 3-m-square base. At its apex a specially-designed value is used to control the mass-flow rate of air from a high-pressure reservoir into the horn where the flow generates a simulated sonic boom or travelling N-wave of suitable amplitude and duration, and acceptably-short rise time. Alternatively, a shock-tube driver can be installed at the apex and used for generating short-duration and rapid rise-time sonic booms. For the mass-flow valve mode of operation of high-frequency sound absorber can be installed near the apex of the horn to filter out of the passing N-wave undesirable jet noise that is produced by the high-speed turbulent flow at the valve.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1974
- Accession Number
- ADA010488
Entities
People
- James Joseph Gottlieb
Organizations
- University of Toronto