Accession Number : ADA018184


Title :   Improved Nozzle Testing Techniques in Transonic Flow


Descriptive Note : Conference proceedings


Corporate Author : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)


Personal Author(s) : Ferri, A


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA018184


Report Date : Oct 1975


Pagination or Media Count : 376


Abstract : The determination of engine inlet, and nozzle performance at transonic speed is one of the most difficult experimental tasks encountered by aerodynamicists. The characteristics of the engine installation (inlet and nozzle) depend on an interaction of the engine flow and the external flow. At transonic conditions small variations of the initial flow properties approaching the boattail can produce significant effects that are difficult to predict and evaluate. In view of the importance and wide interest in the problems of nozzle testing techniques in transonic flow, a special effort is reported to develop an international program of research. The presentation of the results has been organized into two parts. The first part includes a detailed description of the experimental technique used, of the parameters investigated, and sample data from the tests conducted in each facility. The second part contains a critical analysis of the effects of the various parameters investigated.


Descriptors :   *NOZZLES , *TEST METHODS , *TRANSONIC CHARACTERISTICS , BOATTAIL AFTERBODIES , BOUNDARY LAYER FLOW , FLOW FIELDS , GAS DYNAMICS , JET ENGINES , MODEL TESTS , NATO , PRESSURE DISTRIBUTION , SYMPOSIA , THRUST


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE