Spray Analysis


The UAH Propulsion Research Center’s Spray Facility provides a non-reactive environment for the study of liquid rocket and other types of injection devices.  Flow conditions and chamber pressures similar to those encountered within real combustors can be replicated in the facility. This replication allows injector behavior to be experimentally observed.  Such experiments resolve flow measurements that can provide insight into the stability and performance of an injector.

The facility consists of a liquid simulant storage and delivery system, a High Pressure Spray Chamber, and an atmospheric test station.   The primary simulants are filtered de-ionized water and missile grade air. Each can be delivered to the spray chamber or the atmospheric test station at flow rates up to 2 lb/s.

The high pressure chamber consists of an 18 inch internal diameter stainless steel chamber approximately 6 feet tall. This chamber evaluates sprays at pressures up to 500 psi.  The chamber has four 6 inch diameter optical access ports located at 0°, 90°, 180°, and 215°. An adaptable translating injector manifold allows for testing of multiple injector configurations. It also allows for translating of the injector in two directions (axially and radially) while under operating conditions.  The optically-accessible nature of the facility promotes the use of imaging and non-intrusive laser diagnostics. These include shadowgraph, high speed video, phase doppler particle analysis, Mie stattering, and particle image velocimetry.



Images of spray taken in the UAH spray facility. Top Left: Strobe picture, Bottom Left: Backlit image,
Right: PDPA measurement in Atmospheric Spray Station


PRC Spray Facility Footprint