Laser doppler velocimetry (LDV) system

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Many flows in industrial equipment, whether in a nuclear reactor, in a jet engine or in a simple piping system, are complex and often involve velocity fluctuations at high frequencies. In many cases, these velocity fluctuations produce unfavorable effects, such as energy losses, reduced process efficiency, unacceptably high noise levels, or excessive vibrations which may cause fatigue failure. In order to enhance the performance of the equipment involved, without compromising their safe operation, it is necessary to investigate and optimize their flow characteristics. The requested Laser Doppler Velocimetry (LDV) system is a non-intrusive flow measurement tool that can measure two velocity components without disturbing the flow field, especially when measuring unstable thin shear layers or wall boundary layers. LDV can provide reliable measurements in these situations even when the optical access to the measurement location is very limited. The requested LDV system is a versatile flow measurement tool and can be used in a wide range of research and development projects, including challenging high speed unsteady flows exhibiting high frequency fluctuations. The requested instrument will be used by the graduate students of at least five research groups working on various steady and unsteady flow projects, which are relevant to Canadian industry and the economy. The acquisition of this instrument will therefore contribute substantially to enhancing the capability and efficiency of five research groups, to advancing our fundamental understanding of complex steady and unsteady flows, to improving our expertise in designing efficient and safe fluid handling equipment, and to the training of highly qualified personnel.