Electrical Feedthrough Device for Use in a Ballistic Environment

摘要

Interior ballistic studies at the BRL encompass a wide range of experiments dealing with the ignition, flamespread, and combustion of propellants. These studies may deal with an examination of process phenomena as in optical, flash x-ray, or interrupted burner studies, the derivation of high pressure propellant burning rates, as in closed bomb studies, or the chemistry of the processes involved in the combustion sequence of propellants. One common concern of each type of study is the reliable delivery of the energy necessary to initiate the process. Generally, whether the sequence is initiated by a hot wire, electric primer, or electric match, an electric feedthrough device is required to conduct the required current/voltage into the experimental fixture. The electric feedthrough can pose nettlesome problems, especially in experiments where gas temperatures can reach 3000 K and pressures approach 700 MPA. There are many methods for constructing electrical feedthroughs for high pressure vessels. (RH)