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ISSN Print: 2150-766X
ISSN Online: 2150-7678
IF:
0.7
5-Year IF:
0.7
Immediacy Index:
0.1
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0.00016
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0.18
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0.313
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CiteScore™::
1.6
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16
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OPTICAL METHODS FOR THE DETERMINATION OF PROJECTING RELATIVE RADICAL CONCENTRATION AND SOOT TEMPERATURE
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ABSTRACT
In the framework of research on a (transparent) laboratory type of ramjet combustor, a setup has been built to carry out measurements of relative radially projected concentrations of electronically excited C2 and CH. In this setup, a method has been applied wherein, for all locations along the combustor, this concentration is determined simultaneously from one exposure. The results for both types of molecules showed a maximum concentration close to the point of reattachment. To measure the temperature inside the combustor, a setup was developed in which two-color pyrometry was applied. The accuracy was estimated to be 20 K, while the error in simultaneously performed measurements of the emissivity of the flame was 2% at maximum. Results showed a strong dependence of the histories of temperature and emissivity on the experimental conditions at a constant mass flow rate of air.