Stress-release boot can effectively improve the structural integrity of SRM (solid rocket motor), but it will also influence loading fraction and interior ballistic performance, so purpose this paper is to propose a multiobjective optimization method for stress-release boot. The design variables are front rear depth boot, four were determined according analysis performance. To optimize with sta...

The purpose of the Sharp Edge Flight Experiment (SHEFEX) was to investigate the aerodynamic behavior and thermal problems of an unconventional shape for re-entry vehicles comprising multi-facetted surfaces with sharp edges. The main object of this experiment was the correlation of numerical analysis with real flight data with respect to the aerodynamic effects and structural concept for the the...

Modern methods of computational fluid dynamics have been used to study flows with mass supply in axisymmetric channels solid-propellant rocket motor charges. The studies were carried out the aim increasing accuracy predicting intraballistic parameters for performing engineering calculations. analysis changes characteristics flow part channel charge classical and nozzleless solid propellant moto...

Februar y 20 09 PA T RA W LI N G S SA IC A lone amid the cosmic blackness, NASA’s Dawn space probe speeds beyond the orbit of Mars toward the asteroid belt. Launched to search for insights into the birth of the solar system, the robotic spacecraft is on its way to study the asteroids Vesta and Ceres, two of the largest remnants of the planetary embryos that collided and combined some 4.57 billi...

The estimation of erosive burning is great importance for the internal ballistics computation a solid rocket motor (SRM) with large aspect ratio. Because variety parameters affecting burning, most models developed in earlier years usually contain unknown constants that need to be identified by trial-and-error procedure each SRM. Based on an SRM cylindrical grain, new model, which coupled heat t...

Transient waves, like all other acoustic waves, will diffract around solid objects, such as measurement instrumentation. A derivation of an impulse response function on the surface of a rigid sphere, based on linear, classical scattering theory, is presented. The theoretical impulse response function is validated using an experiment with blast noise. An application of the impulse response funct...