This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Impacts of Structural Dynamics on Engine Inlet Flow Characteristics
Annotation ability available
Sector:
Language:
English
Abstract
Mixed compression inlets of the type used for supersonic air breathing engines, such as for the SR-71 and the supersonic transport aircraft, perform efficiently at speeds of around Mach 2.0 to 2.5. These inlets are highly susceptible to unstart when operating in a fuel efficient configuration. An unstart margin allows perturbations in mass flow and incoming flow incidence angle, which result from combinations of many contributors, which may include: gust, engine misalignment, control system tolerance, sidewash and upwash due to maneuver, and structural flexibility effects. This paper develops a methodology by which the last two effects may be analyzed to determine their contribution to changes in incoming flow incidence angle.
Recommended Content
Technical Paper | Aircraft Subsystem Waste Energy Recovery and Management |
Technical Paper | The Feasibility of Using an INS for Control System Feedbacks |
Technical Paper | SR-71 Digital Automatic Flight and Inlet Control System |
Authors
Topic
Citation
Henderson, D., "Impacts of Structural Dynamics on Engine Inlet Flow Characteristics," SAE Technical Paper 985539, 1998, https://doi.org/10.4271/985539.Also In
References
- Adams, W. M. Jr. Hoadley, S. T. “ISAC: A Tool for Aeroservoelastic Modeling and Analysis” NASA TM-109031
- Rodden, W. P. Johnson, E. H. “MSC / NASTRAN, Aeroelastic Analysis” The MacNeal-Schwendler Corporation,- 1994