NASA developed the Quiet Short-Haul Research Aircraft (QSRA) in the late 1970s to explore designs for future inner-city STOLports, focusing on quiet operations and short runway capabilities. The QSRA ...

The stars of the "Jaws" films--sharks--have recently become the subject of a new engineering research project. The project explores energy conservation and boundary layer control in regard to a ...

A typical challenge for re-entry vehicles during flight is an effective control of hypersonic transition and the laminar/turbulent state of the boundary layer. The state of the boundary layer is of ...

Jim Bede's experimental XBD-2 aircraft, first flown in 1961, featured several unconventional design elements aimed at superior performance. Key innovations included two piston engines housed in the ...

Turbulence makes many people uneasy or downright queasy. And it's given researchers a headache, too. Mathematicians have been trying for a century or more to understand the turbulence that arises when ...

The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

It seems like only a couple of months since Boundary Layer announced its $5 million-ish round of financing, but the company hasn’t been resting on its laurels. Today, its founders told me it signed up ...

ABSTRACT We have modeled the wintertime boundary‐layer seeing over the Antarctic ice sheet and find it to be both strong and ubiquitous. We quantify the relations for both the boundary‐layer height ...

If there are no shear stresses present, there is no fluid deformation, and the behavior of a fluid is described by the bulk modulus relating the pressure and the compression strain. In the presence of ...