A. A. Kim, K. V. Eliseev, V. V. Akapiev, V. L. Akapiev, S. E. Savotchenko, A. S. Gorlov, “Optimization of parameters of gas-generator and lidar systems for measuring air flows in nondestructive examination of cooling microchannels at short distances”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2020, Volume 46, Issue 9,Pages <nobr>20

Optimization of parameters of gas-generator and lidar systems for measuring air flows in nondestructive examination of cooling microchannels at short distances

A. A. Kim^ab, K. V. Eliseev^a, V. V. Akapiev^a, V. L. Akapiev^c, S. E. Savotchenko^d, A. S. Gorlov^d

^a Baltic State Technical University, St. Petersburg
^b Lasers Sistems Ltd., St.-Petersburg
^c Federal State Public Educational Establishment of Higher Training «Belgorod Law Institute of Ministry of the Internal of the Russian Federation named after I.D. Putilin»
^d Belgorod Shukhov State Technological University

Abstract: A method of nondestructive examination of the state of cooling microchannels of heavily loaded turbine blades by measuring the speed of an exiting aerosol-containing air flow using a continuous-wave coherent Doppler lidar is described. A mathematical model by use of which optimum values of parameters of gas-generator and lidar systems are determined is developed. The effect of the diameter of aerosol particles on the backscattered power is studied.

Keywords: Doppler lidar, nondestructive examination, backscattering, aerosol, scattering cross section.

Received: 12.07.2019
Revised: 10.02.2020
Accepted: 10.02.2020

DOI: 10.21883/PJTF.2020.09.49367.17977