Widnall was born and raised in Tacoma, Washington, graduating from the Aquinas Academy for Girls in 1956. She graduated from MIT with a SB in 1960, SM in 1961, and ScD in 1964, all in Aeronautics.[5] Her master's thesis was entitled Boundary layer stability over flexible surfaces and her doctoral thesis was entitled Unsteady loads on hydrofoils including free surface effects and cavitation, both under the supervision of Marten T. Landahl.[6][7]
On July 4, 1993, in the wake of the Tailhook scandal, PresidentBill Clinton announced her nomination to be Secretary of the Air Force.[10] The Senate received her nomination July 22, 1993, and confirmed her two weeks later on August 5, 1993, 183 days after inauguration and 197 after the office became vacant.[11] She was the first woman to head a branch of the US military.[4] During her tenure she handled the Kelly Flinn scandal.[12] She was elected to the National Academy of Engineering in 1985,[13] serving as vice-president from 1998 to 2005[14]
and winning their Arthur M. Bueche Award in 2009.[15]
She currently works with the Lean Advancement Initiative. She married William Soule Widnall in June 1960. Her husband earned a doctorate degree from MIT in aerospace engineering and headed the MIT-Draper team that developed the Apollo GN&C system.[16] The couple has two grown children, William and Ann Marie.[17]
Research
Widnall's research has been focused on fluid mechanics, in particular the aerodynamics of high-speed vehicles, helicopters, aircraft wakes, and turbulence. One of her most notable works is on the elliptical instability mechanism with Raymond Pierrehumbert.[18]
^"Sheila E. Widnall." Encyclopedia of World Biography, 2nd ed. 17 Vols. Gale Research, 1998. Reproduced in Biography Resource Center. Farmington Hills, Mich.: Gale, 2008. http://galenet.galegroup.com/servlet/BioRC Document Number: K1631006966. Fee. Accessed 2008-10-31. Updated: 12/12/1998.
^"Sheila Widnall." Notable Women Scientists. Gale Group, 2000. Reproduced in Biography Resource Center. Farmington Hills, Mich.: Gale, 2008. http://galenet.galegroup.com/servlet/BioRC Document Number: K1668000457. Fee. Accessed 2008-10-31. Updated: 11/05/2000
^"Sheila E. Widnall." Notable Scientists: From 1900 to the Present. Online. Gale Group, 2008. Reproduced in Biography Resource Center. Farmington Hills, Mich.: Gale, 2008. http://galenet.galegroup.com/servlet/BioRC Document Number: K1619002898 Fee. Accessed 2008-10-31. Updated: 01/01/2001.
^"Nominations Before the Senate Armed Services Committee, First Session, 103d Congress: Hearings Before the Committee on Armed Services, United States Senate". Vol. 103, no. 414. Washington, D.C.: U.S. Government Printing Office. 1994. pp. 1094–1097. ISBN978-0160436116.
^
Stout, David (1997-05-24). "'Part of Me Has Died,' Pilot Says in Apology". New York Times. Retrieved 2008-10-31. Even as she asked in vain for an honorable discharge, First Lieut. Kelly J. Flinn said in a letter to the Secretary of the Air Force that having to leave the service was a punishment she would carry to her grave.
^Pierrehumbert, Raymond; Widnall, Sheila (1982). "The Two-Dimensional and Three-Dimensional Instabilities of a Spatially Periodic Shear Layer". Journal of Fluid Mechanics. 114: 59–82. doi:10.1017/s0022112082000044. S2CID122846528.
Further reading
"Widnall of MIT Is New President-elect Of AAAS." Physics Today (February 1986), p. 69.
Biography, "Dr. Sheila E. Widnall." Office of the Secretary of the Air Force/Public Affairs, November 1993.