Supersonic shock wave boundary layer interactions are common to inlet flows of supersonic and hypersonic vehicles. This paper reports on wall-resolved implicit large-eddy simulations a canonical Mach 2.5 turbulent interaction experiment at the NASA Glenn Research Center. The upstream was nominally axisymmetric two-dimensional. A conical centerbody with 16 deg half-angle maximum radius 0.147D te...

Shock wave boundary layer interactions are common to both supersonic and hypersonic inlet flows. Wall-resolved implicit large-eddy simulations of a canonical Mach 2.5 axisymmetric shock interaction experiment at Glenn Research Center were carried out. A conical was generated with centerbodies 16 deg half-angle cone. The centerbody radii 9.2% 14.7% the test section diameter. interacted turbulent...

The ideal MHD equations are a central model in astrophysics, and their solution relies upon stable numerical schemes. We present an implementation of a new method, which possesses excellent stability properties. Numerical tests demonstrate that the theoretical stability properties are valid in practice with negligible compromises to accuracy. The result is a highly robust scheme with state-of-t...

form of a primary blast wave) that occurs when a powerful explosive detonates in a free field, without nearby surfaces that can interact with the wave. A series of complex shock waves are then generated following the lead shock wave (the original shock front), including reflected shock waves, a Mach stem, an unsteady turbulent jet, and rarefaction waves. These waves can cause sudden compression...

Traveling wave Ti:LiNbO, Mach-Zehnder optical modulators with buried electrodes and etched grooves in the SiO, buffer layer are analyzed by the finite element method. The tradeofl between the bandwidth BW and the half-waue voltage V, is discussed. The value of BW/V7 is used to weight the total performance of the modulator. Taking a thick buffer layer and etching deep grooves in the buffer layer...

We report on the measurement of the time required for a wave packet to tunnel through the potential barriers of an optical lattice. The experiment is carried out by loading adiabatically a Bose-Einstein condensate into a 1D optical lattice. A sudden displacement of the lattice by a few tens of nanometers excites the micromotion of the dipole mode. We then directly observe in momentum space the ...

The evolution of the ground-state hydrogen atom velocity distribution function throughout the stationary shock wave of a supersonic hydrogen plasma jet (3<Mach number<4) is studied using laser-induced fluorescence spectroscopy. The H atom velocity distribution function may be decomposed into two Maxwellian distributions. The fast component of the distribution corresponds to the unhampered super...

SUMMARY An analysis is presented of measurements made at RAE in 1957-1959 on a series of delta wings. Lift and drag have been measured by strain-gauge balance at Mach numbers between 1.4 and 2.8. On some of the wings surface pressure distributions have also been measured. This Report deals mainly with the zero-lift wave drag, but also gives information on skin friction drag and lift-dependent d...

This work proposes an easy-implement quadruple-frequency optical carrier suppression millimeter-wave (OCS-MMW) generation scheme for the generation and transmission of a 2.5 Gbps downlink data stream in a Radio over Fiber (RoF) system, based two commercially Dual-Drive Mach– Zehnder Modulator (DD-MZM). Theoretical analysis for back-to-back (B-T-B) transmission and optical fiber transmission is ...

Wave-particle complementarity is one of the most intriguing features of quantum physics. To emphasize this measurement apparatus-dependent nature, experiments have been performed in which the output beam splitter of a Mach-Zehnder interferometer is inserted or removed after a photon has already entered the device. A recent extension suggested using a quantum beam splitter at the interferometer'...