Rhodamine Based Sensors for Laser Induced Fluorescence for Droplet Temperature Measurements

Volume 4 ◽  
2004 ◽  
Author(s):  
V. Salazar ◽  
J. E. Gonzalez ◽  
L. Rivera ◽  
L. A. Rivera
Keyword(s):  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Laser Sheet ◽  
Laser Induced Fluorescence ◽  
Temperature Measurements ◽  
Temperature Sensitive ◽  
Droplet Temperature ◽  
Temperature Diagnostic ◽  
Fluorescence Thermometry ◽  
Spatial Temperature

Rhodamine based sensors for applications in laser induced fluorescence thermometry were tested, and optimized. Laser Induced Fluorescence (LIF) is an optical non intrusive technique for temperature measurements. The technique uses a temperature sensitive dye, which is excited by a laser sheet providing spatial temperature diagnostic. The fluorescent dyes Rhodamine B and the Rhodamine 110, were used in combination with water. Thus in the present work the main findings regarding to the sensors: RhodamineB-water, RhodamineB-ink, RhodamineB/110-water, and RhodamineB/110-ink, are reported.

Temperature Measurements of Falling Droplets

1990 ◽  
Vol 112 (4) ◽  
pp. 1008-1013 ◽  
Author(s):  
M. R. Wells ◽  
L. A. Melton
Keyword(s):  
Ambient Temperature ◽  
Temperature Measurements ◽  
Droplet Temperature ◽  
Ambient Temperatures ◽  
Free Environment ◽  
Fluorescence Thermometry ◽  
Exciplex Fluorescence

The temperature of 225-μm-dia decane droplets, which have fallen 100 mm through a hot quiescent, oxygen-free environment, has been measured using exciplex fluorescence thermometry. The droplets were doped with pyrene, and the relative intensities of pyrene monomer and excimer emissions were used to determine the droplet temperatures. The droplet temperature increases approximately 0.4°C per °C increase in the ambient temperature up to an ambient temperature of 200°C. Less than 10 percent evaporation was observed for the droplets at the highest ambient temperatures.

Measurement of Temperatures on In-Flight Water Droplets by Laser Induced Fluorescence Thermometry

2003 ◽  
Author(s):  
V. Salazar ◽  
J. E. Gonza´lez ◽  
L. A. Rivera
Keyword(s):  
Temperature Distribution ◽  
Fluorescence Emission ◽  
Laser Induced Fluorescence ◽  
Numerical Results ◽  
Temperature Measurements ◽  
Water Droplets ◽  
Fluorescence Dye ◽  
Instantaneous Temperature ◽  
Natural Fluorescence ◽  
Fluorescence Thermometry

This work presents the use of laser induced fluorescence for instantaneous temperature measurements of a 200μm diameter water droplets monodispersed stream traveling downward in a standard stagnant atmosphere. The droplets are doped with small concentrations of a natural fluorescence dye (Pyrene), and with a surfactant substance, cetyldimetylbenzylammoniumchloride (CDBAC) to improve the fluorescence emission. The rate of the two-band pyreme emission (excimer to monomer) is used to determine the temperature. The temperature distribution along the stream of droplets determined for different initial temperatures: (30°C, 40°C and 50°C) at the exit of the nozzle compared very favorably with numerical results.

Measurement of Temperatures on In-Flight Water Droplets by Laser Induced Fluorescence Thermometry

2004 ◽  
Vol 126 (2) ◽  
pp. 279-285 ◽  
Author(s):  
V. M. Salazar ◽  
J. E. Gonza´lez ◽  
L. A. Rivera
Keyword(s):  
Temperature Distribution ◽  
Fluorescence Emission ◽  
Laser Induced Fluorescence ◽  
Temperature Measurements ◽  
Water Droplets ◽  
Band Emission ◽  
Fluorescence Dye ◽  
Instantaneous Temperature ◽  
Natural Fluorescence ◽  
Fluorescence Thermometry

This work presents the use of laser induced fluorescence for instantaneous temperature measurements of 200 μm water droplets in a monodisperse stream while traveling downward in a standard stagnant atmosphere. The droplets are doped with small concentrations of a natural fluorescence dye (Pyrene), and with a surfactant substance, cetyldimetylbenzylammoniumchloride (CDBAC) to improve the fluorescence emission and the rate of its two band emission (excimer to monomer) is used to determine the temperature. The temperature distribution along the stream of droplets was determined for three different initial temperatures: 30°C, 40°C, and 50°C at the exit of the nozzle and it is compared very favorably with numerical results.

scholarly journals Investigation of Five Organic Dyes in Ethanol and Butanol for Two-Color Laser-Induced Fluorescence Ratio Thermometry

Optics ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Yogeshwar Nath Mishra ◽  
Ajeth Yoganantham ◽  
Matthias Koegl ◽  
Lars Zigan
Keyword(s):  
Rhodamine B ◽  
Fluorescence Spectra ◽  
Rhodamine 6G ◽  
Organic Dyes ◽  
Laser Induced Fluorescence ◽  
Eosin Y ◽  
Temperature Dependent ◽  
Spectral Bands ◽  
Sulforhodamine 101 ◽  
Fluorescence Thermometry

In this article, we compare absorption and temperature-dependent fluorescence spectra of five organic dyes for 2c-LIF (two-color laser-induced fluorescence) thermometry in ethanol and butanol. The dyes fluorescein, eosin Y, rhodamine B, rhodamine 6G, and sulforhodamine 101 individually mixed in ethanol and butanol were studied at liquid temperatures of 25–65 °C. The self-absorption spectral bands are analyzed along with intensity ratios and the respective sensitivities for one-dye and two-dye 2c-LIF thermometry are deduced. For one-dye 2c-LIF, rhodamine B showed the highest sensitivity of 2.93%/°C and 2.89%/°C in ethanol and butanol, respectively. Sulforhodamine 101 and rhodamine 6G showed the least sensitivities of 0.51%/°C and 1.24%/°C in ethanol and butanol, respectively. For two-dye 2c-LIF, rhodamine B/sulforhodamine 101 exhibited the highest temperature sensitivities of 2.39%/°C and 2.54%/°C in ethanol and butanol, respectively. The dye pair eosin Y/sulforhodamine 101 showed the least sensitivities of 0.15%/°C and 0.27%/°C in ethanol and butanol, respectively.

Sign in / Sign up

Export Citation Format

Share Document