In this paper, we analyze the trajectory and body attitude data of Felix Baumgartner's supersonic free fall through the atmosphere on October 14, 2012. As one of us (UW) was scientific advisor to the Red Bull Stratos team, the analysis is based on true body data (body mass, wetted pressure suit surface area) and actual atmospheric data from weather balloon measurements. We also present a fully ...

A D3Q19 hybrid recursive regularized pressure based lattice-Boltzmann method (HRR-P LBM) is assessed for the simulation of complex transonic flows. Mass and momentum conservation equations are resolved through a classical LBM solver coupled with finite volume resolution entropy equation complete compressible preserving stability, accuracy, computational costs. An efficient treatment wall open b...

Recent developments in numerical simulations the aerodynamics field are focused on reducing computational cost of solvers, targeting their use at initial design steps. Under right assumptions, potential solvers can be exploited to accomplish a valid solution flow for streamlined bodies subsonic and close transonic flows. A fully embedded approach solve full-potential equation is presented, wher...

We establish the existence and stability of multidimensional transonic flows with transonic shocks through an infinite nozzle of arbitrary cross-sections, including a slowly varying de Lavel nozzle. The transonic flow is governed by the inviscid steady potential flow equation with supersonic upstream flow at the entrance, uniform subsonic downstream flow at the infinite exit, and the slip bound...

the present research simulates time-periodic unsteady transonic flow around pitching airfoils via the solution of unsteady euler and navier-stokes equations, using time spectral method (tsm) and compares it with the traditional methods such as bdf and explicit structured adaptive grid method. the tsm uses a fourier representation in time and hence solves for the periodic state directly accordin...

A block lower-upper symmetric Gauss-Seidel (BLU-SGS) implicit dual time-stepping method is developed for moving body problems with hybrid dynamic grids. To simulate flows over complex configurations, a hybrid grid method is adopted in this paper. Body-fitted quadrilateral (quad) grids are generated first near solid bodies. An adaptive Cartesian mesh is then generated to cover the entire computa...

Flow control for turbulent skin-friction drag reduction is applied to a transonic airfoil improve its aerodynamic performance. The study based on direct numerical simulations (with up 1.8 billion cells) of the compressible flow around supercritical airfoil, at Reynolds and Mach numbers $Re_\infty = 3 \times 10^{5}$ $M_\infty =0.7$ . Control via spanwise forcing over fraction suction side airfoi...

Transonic aerodynamics is the focus of strong interest at the present time because it is known to encompass one of the most efficient regimes of flight. While current transport aircraft operate just below the speed of sound, more radical aerodynamic designs, such as R. T. Jones’ proposal for a yawed wing in [1], favor operation at low supersonic speeds in the range from Mach 1 to 1.3 (a regime ...

Abstract Recently developed lean-burn combustors offer reduced NOx emissions for gas turbines. The flow at exit of is dominated by hot streaks and residual swirl, which have been shown—individually—to impact turbine aerodynamic performance. Studies shown that swirl inlet to the high-pressure (HP) stage predominantly affects vane aerodynamics, while affect rotor aerodynamics. also these changes ...

Domain decomposition (Krylov-Schwarz) iterative methods are natural for the parallel implicit solution of multidimensional systems of boundary value problems that arise, for instance, in aerodynamics. They provide good data locality so that even a high-latency workstation network can be employed as a parallel machine. Matrix-free (Newton-Krylov) methods are natural when it is unreasonable to co...