Vassilis Theofilis from the University of Liverpool and Pino Martin from the Department of Aerospace Engineering at the University of Maryland had their peer reviewed research reviewed and reported by Dr. Sarah Popkin, AFSOR in Springer Nature's publication, Theoretical and Computational Fluid Dynamics on February 21, 2022.  Dr. Popkin reported about how flow phenomena on maneuverable vehicles that fly at hypersonic speeds and altitudes that reach the Earth's upper stratosphere and lower mesosphere pose challenges that are on the reported that cutting edge of today's research frontiers of Fluid Mechanics (Springer Nature, 2022).

     Dr. Popkin reported that research agencies around the world have realized the multiple benefits derived from studying actual flying platforms and support for hypersonic research has increased dramatically in the last 10 years (Springer Nature, 2022).  Peer reviewed hypersonic works first appeared in 1940 and grew steadily until we landed on the moon in 1969.  Peer reviewed publications that contained the word hypersonic in the title were about 200 in that year.  Worldwide this number dropped to just under 100 in 1980 and climbed steadily until plateauing at 500 or so at the turn of the century.  Since then, we've seen another 45 or so each year reaching 1400 publications in 2020.

     Dr. Popkin explains further that much more hypersonic research is needed explaining that current interest in maneuverable hypersonic flight is typically in the 40-70km range which corresponds to the least understood layers of the Earth's atmosphere.  She cites a predominant example of research that is dependent on a number of both known unknowns and unknown unknowns (Springer Nature, 2022).  She completes her summary explaining that continued research is still needed to analyze long-standing hypersonic transition problems as well as to address instability on three-dimensional geometries relevant to hypersonic flight (Springer Nature, 2022).

     Dr. Sarah Popkin is a Program Officer at Air Force Office of Scientific Research.  She has been involved with hypersonic sonic research since 2007.  She received her PhD in Aerospace, Aeronautical and Astronautical Engineering from the University of Maryland in 2014 (Popkin).

 

 

 

 

 

Works Cited

Popkin, D. S. (n.d.). Sarah Popkin. Retrieved from Linkedin: linkedin.com/in/sarah-popkin-93315598

Springer Nature. (2022, February 21). Springer-Verlag GmbH Germanyebruary. Retrieved from Special Issue on the fluid mechanics of hypersonic flight: https://link.springer.com/article/10.1007/s00162-022-00605-2#Sec1

 

 

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