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Opportunity at Air Force Research Laboratory (AFRL)

Aerodynamics Research for Airframe-Propulsion Integration

Location

Aerospace Systems Directorate, RQ/Aerospace Vehicles Division

RO# Location
13.30.09.C0727 Wright-Patterson AFB, OH 454337103

Advisers

name email phone
Stuart Ira Benton stuart.benton.1@us.af.mil 937-713-6695

Description

Future aerospace systems will span a wide range of speed and size classes. Each aircraft concept places a unique set of requirements on the integration of a high-performance inlet to feed air to the gas turbine engine. In our research group we seek to combine low-cost experimental testing with modern computational analysis to gain a better understanding of the flow field and enable advanced inlet concepts through a design, analyze, build, and test methodology. This research area covers the design and analysis of inlet systems for subsonic through supersonic applications. Aerodynamics of separated flow in diffusing internal ducts and shockwave boundary layer interactions are featured prominently in unsteady and three-dimensional configurations. Practical approaches to the use of computational fluid dynamics which enables the minimum fidelity required for successful prediction of total pressure recovery and flow distortion are needed to evaluate new inlet systems and explore aerodynamic flow control. This includes the use of hybrid RANS/LES techniques to compute unsteady characteristics of the distorted flow field at the fan/compressor interface.

Topics of interest include:
(1) efficient simulation of supersonic inlets, including modelling of boundary layer bleed and inlet starting procedures,
(2) hybrid RANS/LES of inlet systems with a focus on prediction of peak unsteady inlet distortion,
(3) novel flow control approaches applied to inlet flow fields,
(4) effects of forebody integration as well as off-design speed and incidence on inlet performance,
(5) experimental approaches to generate flow distortions which mimic the downstream influence of various components of the inlet system,
(6) statistical approaches for the reduction of computational and experimental data related to post-processing engine-face distortion patterns,
(7) systems-level analysis of gas-turbine installation effects on aircraft and/or engine performance.

Example references:

Burrows et al. "Experimental and Numerical Investigation of Active Flow Control of a Sepentine Diffuser," AIAA Journal, Vol. 59, No, 2, February 2021.

Schwer et al. "Pressure characteristics of a ram-RDE diffuser," Aerospace Science and Technology, Vol. 85, February 2019.

88ABW-2020-2366

Keywords:
aerodynamics; propulsion; computational fluid dynamics; unsteady; inlets; nozzles; supersonic; boundary layer;

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants

Stipend

Base Stipend Travel Allotment Supplementation
$76,542.00 $4,000.00

$3,000 Supplement for Doctorates in Engineering & Computer Science

Experience Supplement:
Postdoctoral and Senior Associates will receive an appropriately higher stipend based on the number of years of experience past their PhD.

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