Non-intrusive Diagnostics to Quantify Interactions between High-speed Flows and Hydrometeors
Navy STTR 2020.A - Topic N20A-T020
ONR - Mr. Steve Sullivan [email protected]
Opens: January 14, 2020 - Closes: February 26, 2020 (8:00 PM ET)
TECHNOLOGY AREA(S): Air
Platform, Sensors, Weapons
ACQUISITION PROGRAM: ONR
Hypersonics D&I Program
OBJECTIVE: Develop and
demonstrate non-intrusive diagnostics to: (1) quantify the spatiotemporal
evolution of raindrops, ice crystals (clouds), and snow during high-speed
aerobreakup; and (2) simultaneously quantify aerobreakup effects on the
surrounding gas parameters such as velocity, composition, and thermodynamic
DESCRIPTION: The effect
of adverse weather on hypersonic flight conditions is not well understood.
Hydrometeors such as rain, hail, snow, and ice disrupt the flow field and
impinge on the vehicle surface. Because the impact forces approximately scale
as the velocity squared, hypersonic vehicles are at greater risk of damage [Ref
1]. The modeling and understanding of weather encounters are challenging
because the vehicle flow field alters the impact boundary conditions as a
function of time. Since existing computational models cannot capture these
complex, multiscale finite-rate processes, weather effects are currently
estimated via component testing and empirically derived correlations.
PHASE I: Design a
non-intrusive instrument or a suite of non-intrusive instruments to quantify
the spatiotemporal evolution (three-dimensional, time-resolved measurements) of
raindrops, ice crystals (clouds), and snow during high-speed aerobreakup, and
concurrently quantify aerobreakup effects on the surrounding gas. (Note:
Preferably, benchtop demonstrations of the instrument concepts shall occur in a
shock tube or other facilities producing a relevant environment.) Develop a
Phase II plan.
PHASE II: Refine and
optimize the instrument and/or suite to produce a viable prototype. Demonstrate
the performance of the prototype in a relevant ground test facility such as a
ballistic range (light-gas gun), wind tunnel, or shock tube. Produce relevant
data to quantify the spatiotemporal evolution of raindrops, ice crystals
(clouds), and snow during high-speed aerobreakup and the effect of the
aerobreakup on the surrounding gas. Assess interactions with single and
multiple droplets (corresponding to relevant precipitation rates).
PHASE III DUAL USE
APPLICATIONS: Private companies have demonstrated interest in commercial
hypersonic flight. It will be important to assess the impact of weather effects
on commercial systems. The developed instrumentation suite could be used in
high-speed ground test facilities operated by the commercial sector.
1. Moylan, B., Landrum,
B. and Russell, G. "Investigation of the Physical Phenomena Associated
with Rain Impacts on Supersonic and Hypersonic Flight Vehicles., Procedia
Engineering, 2013, pp. 223-231. https://www.sciencedirect.com/science/article/pii/S1877705813009326/pdf?md5=068388223a25f6b1823be3307a1b8d06&pid=1-s2.0-S1877705813009326-main.pdf
2. Theofanous, T.G.,
Mitkin, V.V., Ng, C.L., Chang, C.H., Deng, X. and Sushchikh, S. "The
physics of aerobreakup. II. Viscous liquids", , Physics of Fluids, 2012. https://aip.scitation.org/doi/full/10.1063/1.3680867
3. Moylan, B. Raindrop
Demise in a High-Speed Projectile Flowfield: A Dissertation. University of
Alabama in Huntsville, 2010. https://www.worldcat.org/title/raindrop-demise-in-a-high-speed-projectile-flowfield-a-dissertation/oclc/673870343
4. Thurow, B., Jiang, N.
and Lempert, W. "Review of ultra-high repetition rate laser diagnostics
for fluid dynamic measurements.", Measurement Science and Technology,
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Richter, M. and Alden, M. "Time-resolved (kHz) 3D imaging of OH PLIF in a
flame.", Experiments in Fluids, 2014. https://link.springer.com/article/10.1007/s00348-014-1764-y
6. Roy, S., Jiang, N.,
Hsu, P., Slipchenko, M., Felver, J., Estevadeordal, J. and J. Gord.
"Development of a three-legged, high-speed, burst-mode laser system for
simultaneous measurements of velocity and scalars in reacting flows."
Optics Letters, 2018. https://www.osapublishing.org/ol/viewmedia.cfm?uri=ol-43-11-2704&seq=0
7. Halls, B., Hsu, P.,
Jiang, N., Legge, E., Felver, J., Slipchenko, M., Roy, S., Meyer, T. and Gord.
J. "kHz-rate four-dimensional fluorescence tomography using an
ultraviolet-tunable narrowband burst-mode optical parametric oscillator.",
Optica, 2017. https://www.osapublishing.org/optica/abstract.cfm?uri=optica-4-8-897
8. Halls, B.R., Rahman,
N., Meyer, T.R., Lightfoot, M.D.A., Slipchenko, M.N, Roy, S. and Gord, J.R.
"Four-Dimensional X-ray Imaging of Multiphase Flows." Imaging and
Applied Optics, 2018. https://www.osapublishing.org/abstract.cfm?uri=LACSEA-2018-LM3C.2
Effects; Multiphase Flows; Laser Diagnostics; Tomography; Hypersonics;
High-speed Flows; Ground Test