Triple Configurations of Steady and Propagating Shocks

Grid-Characteristic Method for Calculation of Discontinuous Non-Steady Flows of a Multicomponent Reacting Gas in Channels

“…When solving many applied problems, numerically examining unsteady flows of multicomponent gas mixture with physicochemical transformations is required. In this case, in the flow field, there may be zones of rapid changes in the flow parameters or their gradients; they may include shock waves, contact discontinuities (strong discontinuities), and boundary characteristics of expansion wave fans (weak discontinuities) [1][2][3][4][5][6][7][8]. Moreover, the works [1][2][3][4][5][6][7] describe methods in which shock waves and contact discontinuities are clearly distinguished.…”

“…In this case, in the flow field, there may be zones of rapid changes in the flow parameters or their gradients; they may include shock waves, contact discontinuities (strong discontinuities), and boundary characteristics of expansion wave fans (weak discontinuities) [1][2][3][4][5][6][7][8]. Moreover, the works [1][2][3][4][5][6][7] describe methods in which shock waves and contact discontinuities are clearly distinguished. Work [8] is a typical representative of a large number of works, in which reacting flows with shock waves and contact discontinuities are simulated using the shock-capturing method with the condensation of grid lines in areas with a large gradient of parameters.…”

“…Methods with explicit isolation of discontinuity surfaces, unlike the shock-capturing method [1][2][3][4][5][6], allow one to construct adaptive difference grids consisting of both fixed and mobile nodes that can move along the paths of the indicated strong and weak discontinuities, gas trajectories, moving boundaries, etc. This approach provides high-precision results on relatively coarse grids.…”

An Approximate Analytical Model of a Jet Flow with Mach Reflection and Pulsed Energy Supply at the Main Shock

“…The analysis of flows with an irregular (Mach) reflection of shock waves is important in the gas-dynamic design and optimization of supersonic air intakes, nozzles, jet apparatus, launch complexes, as well as in the development of blast technologies and means of suppressing the damaging effect of an explosion [1]. According to [1][2][3], various flow parameters (stagnation pressures, velocities, dynamic pressures, etc.) in flow regions separated by a slipstream issuing from the triple point of Mach reflection can differ significantly.…”