The "advanced disk laser" — An onboard laser diagnostics system for drop tower experiments

2005 ◽  
Vol 17 (3) ◽  
pp. 71-74 ◽  
Author(s):  
Wolfgang Paa ◽  
Wolfgang Triebel ◽  
Christian Eigenbrod ◽  
Mikhail Larionov ◽  
Adolf Giesen
Keyword(s):  
Laser Diagnostics ◽  
Drop Tower ◽  
Disk Laser ◽  
Diagnostics System

Optical Evaluation of Directly Injected Methane Using a Newly Developed Highly Repetitive Laser Diagnostics System

2019 ◽  
Author(s):  
Mirko Geiger ◽  
Lukas Schroeder ◽  
Christian Zoellner ◽  
Dieter Brueggemann ◽  
Juergen Goldluecke lng ◽  
...  
Keyword(s):  
Laser Diagnostics ◽  
Diagnostics System

Diode pumped solid state kilohertz disk laser system for time-resolved combustion diagnostics under microgravity at the drop tower Bremen

2014 ◽  
Vol 85 (3) ◽  
pp. 033106 ◽  
Author(s):  
Volker Wagner ◽  
Wolfgang Paa ◽  
Wolfgang Triebel ◽  
Christian Eigenbrod ◽  
Konstantin Klinkov ◽  
...  
Keyword(s):  
Solid State ◽  
Laser System ◽  
Drop Tower ◽  
Time Resolved ◽  
Disk Laser ◽  
Combustion Diagnostics ◽  
Diode Pumped

An Experimental Study of Influence of the Steam Injection on the Profile Surface on the Turbine Nozzle Cascade Performance

2014 ◽  
Author(s):  
Vladimir Gribin ◽  
Aleksandr Tishchenko ◽  
Victor Tishchenko ◽  
Ilya Gavrilov ◽  
Sergey Khomiakov ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Laser Diagnostics ◽  
Experimental Studies ◽  
Steam Injection ◽  
Trailing Edge ◽  
Heating Steam ◽  
Wide Range ◽  
Steam Parameters ◽  
Diagnostics System ◽  
The Impact

The paper presents the results of experiments on the effect of steam injection on the performance of the wet steam turbine nozzle cascade. The steam injection destroys a liquid film on the surface of the blade and reduces erosion and dangerous droplets after cascade. The results obtained in the vane package cascade which include a slot on the concave surface of the airfoil near the trailing edge of blades. Experimental studies were carried out on wet and superheated steam. A pneumatic measurement system was used to determine the parameters of the main and injection steam. A laser diagnostics system “POLIS” that includes PIV/PTV was used to analyze the impact of heating steam injection on the characteristics of the liquid phase. Profile losses were obtained at different steam parameters and steam injection speeds. The characteristics of the liquid phase behind the trailing edge were obtained in a wide range of operating parameters.

Experimental Setup of a Laser Diagnostics System for a High-Temperature Solar Receiver/Reactor

1994 ◽  
Vol 116 (4) ◽  
pp. 206-211 ◽  
Author(s):  
A. Steinfeld ◽  
R. Bombach ◽  
P. Haueter ◽  
B. Hemmerling ◽  
W. Kreutner ◽  
...  
Keyword(s):  
High Temperature ◽  
Laser Diagnostics ◽  
Cone Angle ◽  
Experimental Setup ◽  
Gas Temperature ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4 ◽  
Diagnostics System ◽  
Solar Receiver ◽  
Anti Stokes

A solar receiver/reactor has been designed specifically to study high-temperature gas phase chemical reactions using a laser based metrology. It is a cavity-type receiver, lined with stabilized ZrO2, and operated at temperatures up to 2000 K. The gas temperature is measured in situ using the coherent anti-Stokes Raman spectroscopy (CARS) of N2. Optical access for the CARS measurement is accomplished via two side windows, each subtending a 118-mrad cone angle at the center of the cavity, providing enough clearance for the input laser beams and the output signal carrying the temperature information. Two endothermic processes were used for the initial evaluation of this method: the NH3 dissociation into N2 and H2, and the CO2-reforming of CH4 into synthesis gas. The process flow was directly exposed to high solar fluxes in addition to infrared radiation emitted by the hot reactor walls. The laser-based metrology performed satisfactorily in spite of the presence of the intense radiation field. This paper describes in detail the technical aspects of the experimental setup, presents examples of spectra and temperature measurements, and discusses practical problems encountered during experimentation.

Laser diagnostics system for a super-thin internal target

1992 ◽  
Vol 74 (1-4) ◽  
pp. 314-314
Author(s):  
V. Pugatch ◽  
G. Sivtsov ◽  
A. Glushko ◽  
G. Pitatelev ◽  
S. Popov ◽  
...  
Keyword(s):  
Laser Diagnostics ◽  
Internal Target ◽  
Diagnostics System
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