cannot pose as an expert In hydrodynamics, although I am sure you 

 recognize that the two fields have similar and related problems. In 

 fact, in ONR we label our program Fluid Dynamics, with part of this 

 program dealing with hydrodynamics and part with aerodynamics. 



Aside from serving as co-hosts, both Cal Tech and NURDC 

 have made major contributions to the work in hydrodynamics, some 

 under ONR sponsorship. For some time Cal Tech has been studying 

 a problem of critical concern to the Navy. This is the damage 

 caused to propellers and other vital components by cavitation. 

 Theoretical and experimental investigations on basic problems in 

 fluid mechanics conducted here are assisting naval engineers in 

 solving cavitation damage problems. At the same time, this work 

 is adding to our knowledge of the phenomenon known as supercavita- 

 tion, which has led to the development of supercavitating propellers 

 and hydrofoils resulting in increased speed of specialized naval 

 vehicles. 



A major program at NURDC sponsorship promises not only 

 to reduce drastically drag resistance during turbulent flow but also 

 to reduce the flow noise which frequently interferes with sonar 

 operations, I am referring to the use of polymer additives which 

 when injected into the boundary layer of water promises to give naval 

 vehicles the capability of burst speed. 



At present NURDC is engaged in achieving a complete under- 

 standing of the mechanism of the drag and noise reduction properties 

 of dilute solutions of polymer additives. This will give us a firm 

 technical basis for predicting what extent we can achieve drag re- 

 duction and flow-noise suppression on Navy vehicles. 



Research in hydrodynamics is carried out under contract to 

 ONR at a variety of academic and at industrial organizations and at 

 naval laboratories and field stations. Typical of the universities 

 participating in the program are Stevens Institute, the Massachusetts 

 Institute of Technology, Stanford, University of California, Harvard, 

 Florida State, and Michigan in addition to Cal Tech. Industrial 

 organizations include Hydronautics , Inc. , and LTV Research Center 

 and the Ampex Corp. Our in- house work in addition to NURDC is 

 performed at the Naval Ship Research and Development Center, the 

 Naval Research Laboratory, the Naval Ordnance Laboratory and the 

 Naval Postgraduate School in Monterey, California. 



Each of these three elements -- the university, industry and 

 the Navy laboratory -- have a unique contribution not only to the 

 Navy's fluid dynamics program but to Navy research and development 

 in general. Universities provide us with the more fundamental data 

 on which all good technology is based. Industry has special know- 

 how in producing test beds and experimental hardward needed to 

 prove our theories. The Navy laboratory provides in one location 

 theoretical scientists working with naval engineers and naval officers 



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