HYKAT is an acronym for a water tunnel that will be used for both hydroacoustic and cavitation testing. It has a somewhat different configuration than conventional water tunnels, and therefore has been subjected to conHiderable analysis. The first studies carried out at the St. Anthony Falls llydraulic Laboratory were primarily concerned with the overall characteristics of the facility. These studies resulted in a recommendation for the shape of the contraction for a given contraction ratio, analysis of the turning vanes in the first elbow, turbulence management system, and overall headloss estimations. The entire effort was a "paper" study, and consisted of mathematical modeling and other analysis based on previous studies and available data. The results have been reported earlier . As a result of the above mentioned work, it was recommended that additional work be carried out to verify the performance of the preliminary design. The overall configuration of the HYKA T that was to be evaluated is Hhown in Fig. 1. This configuration is slightly different than that originally proposed. The second elbow has been changed from a round to square cross-section, and the number of turning vanes in the elbows has been increased. The study was to include both physical and mathematical modeling. The math modeling was to be verified by the physical model so that it could then be used to predict the performance of the full-scale IIYKAT. The math model would also be useful in guiding the experimental programs and possibly be used in defining new boundary shapes, if deemed necessary. A combination of both types of modeling has proven to be very effective, particularly with the opportunity for close liaison being available between the two modeling groups at the Laboratory. The results of these efforts are discussed in detail in the following sections.
|Original language||English (US)|
|State||Published - Dec 1988|