Study of entrainment and mixing process for an air to air jet ejector
Abstract
An air jet ejector works on the principle of a main jet entraining and driving the secondary air to the mixing chamber. The present work is an experimental investigation for determining the entrainment characteristics of the axisymmetric jet kept at distances of various nozzle diameter from the start of the mixing chamber. Experiments are conducted with various diameter ratios of the nozzle to the chamber for estimating the optimum entrainment rate. At higher Reynolds number, the entrainment rate is found to be independent of Reynolds number as reported by Ricou and Spalding. The decay of centerline velocity and the velocity distribution along the axis decides the length of the mixing chamber. Flow reversals are observed in the initial region of the mixing chamber. The velocity profiles are found to be different than that of the flow with parallel streams.
- Publication:
-
In: Symposium on Jet Pumps and Ejectors and Gas Lift Techniques
- Pub Date:
- 1975
- Bibcode:
- 1975sjpe.proc....2V
- Keywords:
-
- Air Jets;
- Ejectors;
- Entrainment;
- Jet Mixing Flow;
- Axisymmetric Flow;
- Flow Velocity;
- Mixing Length Flow Theory;
- Nozzle Flow;
- Nozzle Geometry;
- Reynolds Number;
- Fluid Mechanics and Heat Transfer