Characteristics of self-excited pulsating gas flow in circular and rectangular ducts
Abstract
Experimental data on self-excited pulsating flows of a gas in rectangular and circular ducts are presented. A critical air flow from a nozzle expands at a point of sudden expansion of the pipe and attains a supersonic velocity. In self-excited pulsation the structure of the flow changed from a shock wave to a cellular structure in the supersonic region. A rectangular pipe is characterized by asymmetry of the flow in a certain pressure range. Flow asymmetry was not observed in the circular duct. The pulsation mechanism in both cases was the onset of resonance in the duct.
- Publication:
-
Archiwum Budowy Maszyn
- Pub Date:
- 1978
- Bibcode:
- 1978ArBuM..25...57W
- Keywords:
-
- Ducted Flow;
- Flow Geometry;
- Gas Flow;
- Pressure Pulses;
- Unsteady Flow;
- Axisymmetric Flow;
- Critical Flow;
- Flow Characteristics;
- Interferometry;
- Mach Number;
- Reynolds Number;
- Self Excitation;
- Shock Waves;
- Supersonic Flow;
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer