P. P. Belousov

Laser Doppler chromatic imaging of rotating structures

A method of the flow field velocity monitoring has been developed based on the laser Doppler imaging with chromatic selection of the velocity vector components in an orthogonal coordinate basis set.

Measuring the Shape of Cylindrical Samples by the Laser Doppler Method

An optical method for measuring the shape of the normal guide bearing of a solid uniform cylindrical sample is presented (the guide bearing lies in the plane orthogonal to the cylinder elements). The method is based on measuring the linear speed of a cylinder, which is rolling over plane guides. The possibility of measuring small deviations (a few microns for a 10-mm-diameter cylinder) of the bearing from the circular shape is demonstrated. The reliability of results is verified by micrometric measurements of the diameter. The shape of the guide of a solid cylindrical roller from the 3ГП 3 roller bearing with a diameter of 9 mm was measured as an example. It is shown that the guide bearing shape is approximately sinusoidal with a period of 2π and an amplitude of periodical variations of ±1.5 μm.

Measurement of noncircularity of cylinders freely rolling on directing supports or a smooth surface

A new optical method of measuring noncircularity of cylinders is experimentally justified. The method is based on measuring the horizontal projection of velocity of a rolling circular body and calculating the maximum deviation of the local radius periodically repeated in the course of motion. Results measured by the proposed method are compared with direct measurements by a micrometer. The new method allows estimating tolerances of noncircularity in the case of defects of cylinder generatrices and the maximum variations of the radius in the case of guideline noncircularity. The noncircularity measurement error (∼1 µm) is experimentally verified.

Research of kinematic parameters of moving medium in experimental hydrodynamics, gas dynamics, and geodynamics

Diagnostics of the local and field characteristics of moving medium in tasks of hydrodynamics, gas dynamics and geochanges, measurement of the local velocities and the fields of velocities in flows, the radial fluctuations of the earths surface, research of the dynamic structure of shock waves and the dynamic disturbances induced by the shock wave in the air are discussed.

Optical diagnostics of dynamic structures in shock waves

We demonstrate the possibility of applying optical diagnostics based on laser Doppler anemometry techniques and the laser imaging of dynamic density fields to the investigation of kinematic and structural parameters of shock waves and the properties of air perturbed by shock waves. Using the proposed methods, dynamic structures in the shock wave have been revealed and the velocity of their motion over the wave front has been determined. It is suggested that these dynamic structures have an oscillatory nature.

The December 26, 2004 earthquake in the Indian Ocean and geodynamic perturbations in Novosibirsk

Some results from the monitoring of the geodynamic perturbations in Novosibirsk are considered in relation to the December 26, 2004 earthquake in the Indian Ocean, which gave rise to the catastrophic sea wave.

Laser Doppler Imaging of the Velocity Field in a Swirling Rank Flow

The velocity field in a swirling Rank flow is studied for the first time by the laser Doppler imaging technique.

Recording of the dynamic wave structure at the surface of a rotating liquid

Methods of laser fiber-optic 2D Doppler anemometry and shadow visualization were used for the first time to record the wave structure at the surface of a rotating liquid.