A theory Is presented on the ignition of solid compositions. The effect of certain physical, chemical and themal properties of a solid cooposition on the ignition time and ignition energy is explained and supported by experimental evidence. Different types of ignition systems are described. Problem areas of the normal ignition systoms are discussed and a technique to overcome these problem areas is offered. By use of the developed ignition theory and a hot-bath immersion test apparatus, a technique of determining the true ignition temperature of a conposition is described. flow, qin^, will be assumed.
A proposed nucleation rmechanism is described for mixed smkes composed of potassium iodide and silver iodide. D*e dynaic dissolution of such smoke particles is considered to be theoretically of significance in the nucleation mechanism of supercooled fogs of water droplets. i I RDTR No.
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