Search for dissertations about: "reflected shock"

Showing result 1 - 5 of 20 swedish dissertations containing the words reflected shock.

2. 1. On focusing of strong shock waves

   Author : Veronica Eliasson; Nicholas Apazidis; Nils-Erik Molin; KTH; []
   Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shock focusing; imploding shock; converging shock; reflected shock; annular shock tube; Fluid mechanics; Strömningsmekanik;

   Abstract : Focusing of strong shock waves in a gas-filled thin test section with various forms of the reflector boundary is investigated. The test section is mounted at the end of the horizontal co-axial shock tube. Two different methods to produce shock waves of various forms are implemented. READ MORE

4. 2. Numerical and Experimental study of shock boundary layer interaction in unsteady transonic flow

   Author : Olivier Bron; KTH; []
   Keywords : Shock Boundary Layer Interaction; Shock Motion; Unsteady Flows; Nozzle Flows; Potential Interaction; Back Pressure Perturbations;

   Abstract : A prerequisite for aeroelastic stability prediction inturbomachines is the understanding of the fluctuatingaerodynamic forces acting on the blades. Unsteady transonicflows are complex because of mutual interactions betweentravelling pressure waves, outlet disturbances, shock motion,and fluctuating turbulent boundary layers. READ MORE

5. 3. Underwater shock loaded sandwich structures

   Author : Kjell Mäkinen; KTH; []
   Keywords : ;

   Abstract : The effects of underwater explosions on ships have beenstudied ever since it was realised that explosions under watercould be accomplished. In order to study the response of asandwich structure in water, exposed to an underwaterexplosion, we need to have knowledge about the whole chain ofevents, i.e. READ MORE

6. 4. Dissipation at the Earth's Quasi-Parallel Bow Shock

   Author : Rico Behlke; Mats André; Harald Kucharek; Andris Vaivads; Manfred Scholer; Uppsala universitet; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Space and plasma physics; collisionless shocks; wave-particle interactions; nonlinear phenomena; cross-shock potential; Cluster spacecraft; Rymd- och plasmafysik; Space physics; Rymdfysik;

   Abstract : The Earth's bow shock is a boundary where the solar wind becomes decelerated from supersonic to subsonic speed before being deflected around the Earth. This thesis presents measurements by the Cluster spacecraft upstream and at the Earth's quasi-parallel bow shock where the angle between the upstream magnetic field and the bow shock normal is less than 45 degrees. READ MORE

7. 5. Discrete element simulation of elasto-plastic shock waves in high-velocity compaction

   Author : Muhammad Shoaib; Leaf Kari; Bruska Azhdar; Wim Desmet; KTH; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; High-velocity compaction; Discrete element method; Plastic deformaiton; dynaimic loading; elasto-plastic shock wave; Friction; Adhesion; Physics; Fysik; Järnvägsgruppen - Ljud och vibrationer; Järnvägsgruppen - Ljud och vibrationer;

   Abstract : Elasto-plastic shock waves in high-velocity compaction of spherical metal particles are the focus of this thesis which consists of four papers (A-D). The compaction process is modeled by a discrete element method while using elastic and plastic loading, elastic unloading and adhesion at contacts. READ MORE