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Show E o o CD > "cO o CD > c CO CD 7.0 6.0 5.0 4.0 3.0 2.0 1 .0 -0.0 -1 .0 -2.0 -3.0 -4.0 • __ * ..-"*-«.. • -r O **0 ,.'* * ""- III II »** -1- - i 1 • . 1 ,._., 1 1 1 1 1 . 1 i 20 40 60 80 100 120 Distance from Exterior of Wall (cm) 140 Figure 4. Mean vertical velocity measured at a selected port. The vertical component of the velocity is plotted as a function of distance from the outside of the furnace wall. obtained in the field and can be used as part of a more systematic approach to combustion/process efficiency optimization. One problem with measurements of this type is limitations on the optical access that is available to the diagnostician. Clearly, it would have been useful to obtain temperature profiles further into the furnace. The problem was not that longer probes could not be fabricated and employed, but rather because of obstructions near the ports that prevented longer probes from being inserted into the ports. On the other hand, to improve the L D V flow velocity measurements will require the use of smaller optics that can be placed inside a water-cooled probe. W e are presently developing such a probe; however the distance for which measurements can be made will again depend on the presence of obstructions near the port. ACKNOWLEDGMENT The authors wish to thank the company where these measurements were made for making us aware of this conference and for giving us permission to present these results. REFERENCES 1. J.P. Singh, F.Y. Yueh, R.L. Cook, J.J. Lee, and J.T. Lineberry, "Comparison of CARS Temperature Profile Measurements with Flow-Field Model Calculations in an M H D Diffuser", Applied Spectroscopy 46, 1649- 1659 (1992). 2. P.-R. Jang, J.S. Lindner, Y. Xu, RK. Lengel, DL. Monts, RL. Cook, W.S. Shepard, DM. Bennert, and J.C. Whitehouse, "Diagnostic Studies of A Mixed Waste Vitification Glass Melter", Proceedings of the 14th International Incineration Conference, Bellevue, W A , May 8-11, 1995, pp. 521-526. -10- |