AXIAL FIELD EFFECTS IN A MAGNETICALLY DRIVEN SHOCK TUBE
Abstract
The effects of a uniform magnetic field normal to the shock front upon shock states and expansion wave properties are theoretically and experimentally investigated for large magnetic-drive fields. One-dimensional theory arid several simplifying assumptions are employed to predict the Important effects. and a simple method of visualizing the possible shock states is obtained. The restrictions upon shock-wave formation imposed by various types of instabilities are considered. A series of experiments has been performed in a magnetically driven shock tube of annular cross section under conditions approaching the assumptions. Some difficulty was encountered in producing well- formed shocks. and a tentative link with the drive-current breakdown characteristics is established. Observations of well-formed shocks indicate close agreement with shock-transition theory. even when the axial magnetic field exceeds the switch-on value. although the expansion wave properties exhibit large departures from the theory. Some estimates of flow adjustments caused by radius effects and leakage through the boundary layer have been made, and are found to contribute to an understanding of the experimental results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 29, 1963
- Accession Number
- AD0401679
Entities
People
- William H. Heiser
Organizations
- Massachusetts Institute of Technology