Hypersonic Vehicle Thermal Structure Test Challenges

Swanson, Andrew D.; Coghlan, Sean C.; Pratt, Dave; Paul, Donald B.; Afb, Wright-Patterson

doi:10.2514/6.2007-1670

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…However, other technologies were novel to OCT research, including ultra-high-resolution sources, certain delay lines ͑i.e., CAMs͒, free-space optical coupling on OCT rotational catheters, and swept source OCT advances. 21,40,41…”

Section: Technology Developmentsmentioning

confidence: 99%

Applications of optical coherence tomography to cardiac and musculoskeletal diseases: bench to bedside?

Brezinski

2007

J. Biomed. Opt.

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Selected historical aspects of the transition of optical coherence tomography (OCT) research from the bench to bedside are focused on. The primary function of the National Institutes of Health (NIH) is to improve the diagnosis and treatment of human pathologies. Therefore, research funded by the NIH should have a direct envisioned pathway for transitioning bench work to the bedside. Ultimately, to be successful, this work must be accepted by physicians and by the general science community. This typically requires robustly validated hypothesis-driven research. Work that is not appropriately compared to the current gold standard or does not address a specific pathology is unlikely to achieve widespread acceptance. I outline OCT research in the musculoskeletal and cardiovascular systems, examining the rapid transition from bench to bedside and look at initial validated hypothesis-driven research data that suggested clinical utility, which drove technology development toward specific clinical scenarios. I also consider the time of initial funding compared to when it was applied in patients with clinical pathologies. Finally, ongoing bench work being performed in parallel with clinical studies is examined. The specific applications examined here are identifying unstable coronary plaque and the early detection of osteoarthritis, the former was brought to the bedside primarily through a commercial route while the latter through NIH-funded research.

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Section: Technology Developmentsmentioning

confidence: 99%

Applications of optical coherence tomography to cardiac and musculoskeletal diseases: bench to bedside?

Brezinski

2007

J. Biomed. Opt.

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“…The heat flux of a vehicle's leading nosetip whose radius is 20mm can reach 2~3MW/m 2 when it flies at Mach 7 at an altitude of 24km, and the wall temperature can reach as high as 1400K. How to design the thermal protection system (TPS) to protect the vehicle from the extremely high temperature is one of the most important problems while the space technology is developed [1][2][3][4] . There are three types of thermal management that can be used to cool hypersonic vehicles: passive, semi-passive, and active.…”

Section: Introductionmentioning

confidence: 99%

Research on cooling effect with coolant groove structure parameters in platelet transpiration cooled nosetip

Liu

2010

J. Therm. Sci.

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A platelet transpiration cooled nosetip is considered as thermal protection system (TPS) to prevent hypersonic vehicle from the serious aerodynamic heating. Based on the one dimensional flow model, a distribution model of coolant is proposed for the temperature calculation. When Si = Sj (i, j=1,…,24), the first cooling effect parameter Pmax is proposed and its relationship with total mass flux and Sc0/Si is investigated. The result shows that Pmax increases while the total mass flux increases, and when the mass flux is fixed, Pmax increases rapidly at the beginning and then turns to a nearly stable value while Sc0/Si increases. Then under the precondition of cooling effect, we fix Sc0/Si to insure there is enough space for the pipe. Numerical investigation shows the design of the nosetip makes the transpiration cooling extremely effective. In order to reduce the temperature difference on the nosetip, the second cooling effect parameter Pdiff is proposed and different Pdiff with different θgi (i=1,…, 23) are analyzed. According to the cases we design, Pdiff decreases while the upstream θgi decreases or the downstream θgi increases. The best result among cases shows Pdiff is reduced by 15.1%.

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“…At the same time, the aircraft is under high temperature, high pressure and strong noise environment, which is caused by high velocity. Coupling of high temperature and high pressure of two kinds of bad environment accelerates the destructive effects of strong noise on aircraft structure [3] .…”

Section: Introductionmentioning

confidence: 99%

Vibro-Acoustic Coupling Analysis of High Velocity Aircraft Based on Hybrid Acoustic Simulation Method

Zhang

Chen

Jia

et al. 2014

AMM

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High-speed aircraft is in service condition of high temperature, high pressure and strong noise during flight. Strong noise will damage structures and equipments of an aircraft, and the existence of high temperature and high pressure will greatly increase the damage degree. Therefore, research on aircraft structure characteristic and surface acoustic characteristic is very significant. The hybrid method of CFD and acoustic solver combination method can accurately obtain aerodynamic noise load on the aircraft structure surface in a high velocity environment. The hybrid method can make acoustic and vibration analysis for aircraft structure, and get influence of noise load on it. The simulated results show that the presence of high temperature and high pressure can make the natural frequency of typical components and whole machine model reduction, and the acoustic load on the aircraft structure model surface is larger at low frequency, smaller at high frequency.

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Hypersonic Vehicle Thermal Structure Test Challenges

Cited by 6 publications

References 3 publications

Applications of optical coherence tomography to cardiac and musculoskeletal diseases: bench to bedside?

Applications of optical coherence tomography to cardiac and musculoskeletal diseases: bench to bedside?

Research on cooling effect with coolant groove structure parameters in platelet transpiration cooled nosetip

Vibro-Acoustic Coupling Analysis of High Velocity Aircraft Based on Hybrid Acoustic Simulation Method

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