Holographic interferometry as a tool for visualization of temperature fields in air

Title:

Holographic interferometry as a tool for visualization of temperature fields in air

Creator:

Dančová, Petra, Vít, Tomáš, Lédl, Vít, Trávníček, Zdeněk, and Doleček, Roman

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:22f9467c-3623-40ff-b8bc-1bec7cb36a23
uuid:22f9467c-3623-40ff-b8bc-1bec7cb36a23

Subject:

Digital Holographic Interferometry (DHI), temperature fields, Mach-Zehnder holographic interferometer, and Twymann-Green interferometer

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Measurement of temperature field in moving fluids is connected with many difficulties. Usage of point temperature measurement methods, such as Constant Current Anemometry (CCA), is limited to frequencies up to 3 kHz. This frequency should be the limiting factor for using the CCA in fluid when fast change of temperature occurs. This shortcoming of CCA measurements should be overcome by using of optical methods such as Digital Holographic Interferometry (DHI). It is necessary to employ a special holographic setup with double sensitivity instead of the commonly used Mach-Zehnder type of holographic interferometer in order to obtain the parameters sufficient for the studied cases. This setup is not light efficient like the Mach-Zehnder type but has double sensitivity. The article also shows the method of synchronization and the method for phase averaging of the acquired data. The presented DHI is based on a modified Twymann-Green setup. and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

205-212

Source:

Engineering mechanics: international journal for theoretical and applied mechanics | 2013 Volume:20 | Number:3-4

Harvested from:

CDK

Metadata only:

false