ASTM D1740-01

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An American National Standard
Designation:D1740–01
Standard Test Method for
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Luminometer Numbers of Aviation Turbine Fuels
This standard is issued under the fixed designation D1740; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This test method has been adopted for use by government agencies to replace Method 2108 of Federal Test Method Standard No. 791b.
1. Scope 4. Summary of Test Method
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1.1 This test method covers the measurement of the flame 4.1 The luminometer number of a fuel is determined by
radiation characteristics of aviation turbine fuels and other burning the fuel in the ASTM-CRC Luminometer lamp and
similar distillate fuels expressed in terms of luminometer obtaining a curve of flame radiation, as measured by an optical
numbers. There is good correlation between smoke point (Test filter and photo cell unit against the temperature rise across the
Method D1322) and luminometer number which is presented burner measured by a thermocouple placed just above the
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in Appendix X1. flame.This temperature rise is compared with that obtained on
1.2 This standard does not purport to address all of the a pair of reference fuels at a constant radiation level.To ensure
safety concerns, if any, associated with its use. It is the that the constant rating level is the same in all units, it is
responsibility of the user of this standard to establish appro- defined as the smoke point of tetralin. Luminometer number is
priate safety and health practices and determine the applica- calculated from the difference in temperature rise between the
bility of regulatory limitations prior to use. For specific test fuel and the temperature rise for tetralin divided by the
precautionarystatements,see7.1,7.2,8.1,8.2andAnnexA1.1. difference in temperature rise for isooctane and tetralin.
NOTE 1—It is the intent of Subcommittee J to ballot to withdraw this
5. Significance and Use
test method when due for reapproval in 2006, because of very limited and
5.1 This test method provides an indication of the relative
declining use to determine compliance with aviation turbine fuel specifi-
radiation emitted by the combustion products of gas turbine
cations.
fuels from a diffusion flame. The radiation level, expressed as
2. Referenced Documents
luminometer number, is related to the hydrocarbon type com-
2.1 ASTM Standards: position of such fuels.Ahigh luminometer number indicates a
D1322 Test Method for Smoke Point of Aviation Turbine fuel of low radiation characteristics.
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Fuels 5.2 The luminometer number (and the smoke point with
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D1655 Specification for Aviation Turbine Fuels which it can be correlated) is qualitatively related to the
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D2880 Specification for Gas Turbine Fuel Oils potential radiant heat transfer from the combustion products of
the fuel. Because radiant heat transfer exerts a strong influence
3. Terminology
on the metal temperature of combustor liners and other hot
3.1 Definitions of Terms Specific to This Standard:
sectionpartsofgasturbines,theluminometernumberprovides
3.1.1 luminometer number—a measure of flame tempera- a basis for correlation of fuel characteristics with the life of
ture at a fixed flame radiation in the green-yellow band of the
these components.
visible spectrum.
6. Apparatus
3.1.1.1 Discussion—It can be correlated with combustion
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characteristics of fuels for use in current commercial aviation 6.1 ASTM-CRC Luminometer, shown schematically in
turbine engines. Fig. 1, consisting of three main parts:
6.1.1 A small wick-type lamp in which the sample is
burned,
6.1.2 An optical filter and photocell circuit which indicates
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This test method is under the jurisdiction of ASTM Committee D02 on
the intensity of flame radiation in the range from 4800 to 7000
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
˚
A and
D02.J0 on Aviation Fuels.
Current edition approved June 10, 2001. Published July 2001. Originally
published as D1740 – 60T. Last previous edition D1740–96.
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Thistestmethodwasdevelopedonthebasisofcooperativeworkcarriedoutby
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the Coordinating Research Council and published in CRC Report “Evaluation of The ASTM-CRC Luminometer, made by ERDCO Engineering Corp., 721
CRC Luminometer” (CRC Project No. CA-16-58). June 1959. Custer Ave., P. O. Box 1310, Evanston, IL 60204 has been used to develop the
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Annual Book of ASTM Standards, Vol 05.01. precision of Test Method D1740.
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