ABSTRACT
Visualization of fluid flow motion proved to be an excellent tool for describing and calculating flow properties in many problems of practical interest, in both subsonic and supersonic flow regimes. For visualizing compressible flows, optical flow visualization techniques are commonly used. Flow visualization with smoke is generally done in a smoke tunnel. It is a low-speed wind tunnel carefully designed to produce a uniform steady flow in the test-section with negligible turbulence. There are many methods as well as materials used for producing smoke. When ammonia vapor is passed over hydrochloric acid, white fumes of ammonium chloride are formed. The corrosive nature of the fume and the tendency to form white deposits make this method of smoke production undesirable, except on rare occasions. Smoke can be produced by partial combustion of damp wood shavings. The kerosene smoke generator consists of a reservoir, an electrically heated glass tube to the top of which is attached a nozzle and a mixing chamber.
