Practical problems associated with laser anemometry in high speed turbomachines

Hydraulic performance evaluation of a micro-turbine with counter rotating runners by experimental investigation and numerical simulation

“…These techniques fit well in turbomachinery applications as past studies have proved [10]. As investigated precise results by these laser and optical measurement techniques are often difficult to achieve since parameters such as the refraction index of both the material interface and the flow, laser alignment, seeding and machine geometry are fundamental to obtain accurate results [11].…”

<title>Suitability of optical techniques for investigating complex flows in difficult environments</title>

“…High temperatures can also cause the rig to expand which can missalign the optical system. Problems associated with laser anemometry in high speed turbomachines have been explained elsewhere by Zaidi [44].…”