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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

EFFECTS OF ANNULAR JET IN INSIDE VAPOR DEPOSITION WITH APPLICATIONS TO OPTICAL FIBER MANUFACTURE

Get access (open in a dialog) DOI: 10.1615/IHTC10.30
pages 209-214

Аннотация

In the annular Modified Chemical Vapor Deposition process using two concentric tubes (inner and outer tubes) , an inner tube is heated to maintain high temperature gradients to increase the thermophoretic force and particle deposition efficiency. In the present paper, a new concept using an annular jet from the inner tube is presented and shown to significantly reduce the tapered entry length while maintaining high efficiency. Of particular interests are the effects of jet velocity and temperature on the deposition efficiency and tapered length. Torch heating effects from both the previous and present passes and the effect of surface radiation between the inner and outer tubes are included.