An Experimental Investigation of the Use of Hot Gas Ejectors for Boundary Layer Removal
Abstract
The feasibility of using an ejector with heated primary flow as a suction pump for boundary layer air removal from an aircraft has been investigated. Effects of some of the basic ejector geometric and state parameters were evaluated. The results indicate that while boundary layer removal by this method is feasible the aerodynamic benefits so obtained are accompanied by a measurable loss of primary jet thrust. Tests show the ejector to be relatively insensitive to the geometric parameters of primary nozzle location and mixing section length. Ejector performance for a given geometry was found to be a function of the primary momentum. The addition of a diffuser substantially increased ejector performance but was accompanied by greatly reduced thrust. Results indicate that an optimum geometry exists for each combination of flow conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1952
- Accession Number
- ADA075881
Entities
People
- Richard D. Wood
- Richard V. Deleo
Organizations
- University of Minnesota