Atomization Performance Predictions of Gas-Centered Swirl-Coaxial Injectors
Abstract
The ability to predict injector performance can reduce the cost of rocket engine development. This paper details a new theory to predict the atomization efficiency and droplet diameter from the atomization of wall-bounded films with strong gas-phase influences. In this theory atomization occurs when a disturbance is created on the film surface then breaks down into droplets via stripping. The theory relates the mass of film lost via atomization to the mass of liquid introduced into the atomizer to predict atomization efficiency and offers some estimations of primary droplet diameter. A specific example involving a gas-centered swirl coaxial injector is discussed. The results of experiments and simulations are used to support assumptions and are successfully compared to some simple predictions from the theory. Despite the application to a specific injector efforts are made to keep the theory as general as possible so that it applies to many types of injectors and a wide range of operating conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 16, 2007
- Accession Number
- ADA468183
Entities
People
- Douglas G. Talley
- Malissa D. Lightfoot
- Stephen A. Danczyk
Organizations
- Air Force Research Laboratory