Impulse Generation by an Open Shock Tube

Impulse Generation by an Open Shock Tube

Weperformexperimental andnumerical studies of a shock tubewith an open end.The purpose is to investigate the impulse due to the exhaust of gases through the open end of the tube as amodel for a partially filled detonation tube as used in pulse detonation engine testing.We study the effects of the pressure ratio (varied from3 to 9.2) and the volume ratio (expressed as fill fractions) between the...

Detonation Tube Impulse in Subatmospheric Environments

Thrust from a multicycle pulse detonation engine operating at practical flight altitudes will vary with surrounding environment pressure. We have carried out the first experimental study using a detonation tube hung in a ballistic pendulum arrangement within a large pressure vessel to determine the effect that the environment has on the single-cycle impulse. Air pressure decreased below 100 kPa...

The Contact Surface in an Electromagnetic Shock Tube

An investigation of the luminosity structure, electron density, temperature, and arrival time of electrode material in the shock heated region of the plasma produced in a T-tube has disclosed that for the conditions studied the luminosity from this region originates primarily from gases that have passed through the contact surface. A plausible explanation for this mixing of discharge gases with...

Incident Shock Wave Interaction with an Axisymmetric Cone Body Placed in Shock Tube

An Open Framework for Unstructured Grid Generation

Traditionally, individual algorithm developers directly incorporate the requirements of their scheme into its resulting software implementation. While this is sufficient for basic execution, it severely limits the expandability and growth potential of the algorithm. An example of such a shortcoming is a fixed method of geometry access in a surface triangulation algorithm. By adopting a single d...