Laval nozzle flow characterization by Fourier-transform Mach-Zehnder interferometry

Francisco Rodriguez; Benito V. Dorrio; Angel F. Doval; Cristina Trillo; Felix Quintero; Marta Miranda; Carlos Lopez; Jose L. Fernandez

doi:10.1117/12.612619

13 June 2005 Laval nozzle flow characterization by Fourier-transform Mach-Zehnder interferometry

Francisco Rodriguez, Benito V. Dorrio, Angel F. Doval, Cristina Trillo, Felix Quintero, Marta Miranda, Carlos Lopez, Jose L. Fernandez

Author Affiliations +

Proceedings Volume 5856, Optical Measurement Systems for Industrial Inspection IV; (2005) https://doi.org/10.1117/12.612619
Event: Optical Metrology, 2005, Munich, Germany

Abstract

The role of the assist gas blown by a nozzle during the laser cutting process of ceramics is very important as a complex flow field is created by the interaction with the material. Flow visualization provides valuable information related with the properties and characteristics of the process in order to clear up misconceptions and as a first step towards the nozzle optimization. Optical methods as Schlieren or interferometry are suitable techniques for this task as well-known non-intrusive full-field methods utilized for analysing fast transient flow phenomena. In this work a Mach-Zehnder interferometer is employed in order to characterize a Laval nozzle by studying the shock wave patterns in a free gas jet as a previous step in order to study the complex interaction of the gas flow against a transparent model of the processed material. The optical phase is extracted from the obtained high-frequency fringe pattern by the Fourier Transform Phase-Difference Method. Disturbing effects are cancelled by proper combination of high-frequency fringe patterns obtained with and without gas flow. The shock wave pattern is analyzed for different geometrical configurations and operating pressures.

Citation Download Citation

Francisco Rodriguez, Benito V. Dorrio, Angel F. Doval, Cristina Trillo, Felix Quintero, Marta Miranda, Carlos Lopez, and Jose L. Fernandez "Laval nozzle flow characterization by Fourier-transform Mach-Zehnder interferometry", Proc. SPIE 5856, Optical Measurement Systems for Industrial Inspection IV, (13 June 2005); https://doi.org/10.1117/12.612619

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available