Analysis of interacting dual lifting ejector systemsAn analytical treatment is presented for a flowfield generated by a pair of interacting, two-dimensional parallel jets, representative of the two exhaust streams issuing from the thrust augmentor nozzles of dual lifting jet VTOL aircraft propulsion systems. Predictions of the analysis for the ratio of primary to secondary velocity are in close agreement with experimentally observed values, if the spreading rate parameter is allowed to assume a value greater than that which applies to a free jet. Theoretical results are combined with existing experimental data for unventilated jets, in order to arrive at an estimate of the thrust augmentation produced by a jet pair with an arbitrary degree of ventilation.
Document ID
19860035157
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lund, T. S. (Stanford Univ. CA, United States)
Tavella, D. A. (Stanford Univ. CA, United States)
Roberts, L. (Stanford University CA, United States)