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Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles / by A.G. Gelalles and E.T. Marsh.
- Format:
- Book
- Government document
- Author/Creator:
- Gelalles, A. G., author.
- Marsh, E. T., author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 369.
- Technical notes / National Advisory Committee for Aeronautics ; No. 369
- Language:
- English
- Subjects (All):
- Airplanes--Motors--Fuel injection systems.
- Airplanes.
- Injectors.
- Nozzles.
- Physical Description:
- 1 online resource (15 pages, 6 unnumbered pages) : illustrations.
- Place of Publication:
- Washington, [D.C.] : National Advisory Committee for Aeronautics, 1931.
- Summary:
- The variation of the coefficient of discharge with the length-diameter ratio of the orifice was determined for nozzles having single orifices 0.008 and 0.020 inch in diameter. Ratios from 0.5 to 10 were investigated at injection pressures from 500 to 5,000 pounds per square inch.
- The tests showed that, within the error of the observation, the coefficients were the same whether the nozzles were assembled at the end of a constant diameter tube or in an automatic injection valve having a plain stem. For these assemblies the coefficient was constant between the ratios of 1 to 4. For ratios greater than 4 the coefficient gradually decreased as a result of friction losses.
- The coefficients of the nozzles when assembled in an injection valve having a helically-grooved stem were lower than when assembled with a plain stem. There was but little variation in the value of the coefficient with the ratio for the 0.20-inch orifice. The coefficient for the 0.008-inch orifice, however, varied considerably with the ratio, showing some irregularities between the ratios of 0.5 and 4.
- Notes:
- Print version record.
- "March, 1931."
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (page 14).
- Electronic reproduction. [S.l.] : HathiTrust Digital Library, 2011.
- Other Format:
- Print version: Gelalles, A.G. Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles.
- OCLC:
- 937437994
- Access Restriction:
- Use copy Restrictions unspecified
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