Numerical analysis of hypersonic continuum and rarefied gas flows near blunt probes is presented under conditions of intensive gas blowing from the surface. Nonequilibrium parameters in the multicomponent flows were evaluated for slot and uniform injections of air, helium, and hydrogen. Numerical results indicate that the most effective cooling of the probe surface occurs at moderate uniform in...

The flow in the turbine endwall region consists of complicated secondary structures driven by lateral pressure gradient, which heavily affects performance film cooling. In this work, film-cooling hole design optimization is performed considering existence gradient real environment. Results have shown that optimal influenced region, especially compound angle clearly different from flat plate res...

We present a high power RF coupler design for an interleaved 2 805 MHz standing wave accelerating structure proposed for an muon cooling experiment at FNAL. The coupler, in its simplest form, is a rectangular waveguide directly connected to an accelerating cell through an open slot on the cavity side-wall or end-plates. Two of such couplers are needed to feed the interleaved cavities. Current h...

With the increasing demand for high-energy density motors applications such as electric vehicles and aircraft propulsion, axial flux permanent magnet are promising. However, utmost care should be taken when designing an motor with a higher torque because of thermal effects. To enhance reliability overall performance motor, efficient management is important, restricted by maximum temperature. Th...

In present-day high-performance electronic components, the generated heat loads result in unacceptably high junction temperatures and reduced component lifetimes. Thermoelectric modules can, in principle, enhance heat removal and reduce the temperatures of such electronic devices. However, state-of-the-art bulk thermoelectric modules have a maximum cooling flux qmax of only about 10 W cm(-2), w...

Upon cooling, a thin metal film deposited on compliant elastomer substrate undergoes equi-biaxial compression and begins to buckle at a critical stress. As further cooling occurs, a highly ordered herringbone pattern self-assembles. The preference for the herringbone pattern over other potential modes is demonstrated based on minimum energy arguments. Control of the pre-buckling in-plane stress...