Accession Number:

AD0262053

Title:

FAR-FIELD NOISE CHARACTERISTICS OF SATURN STATIC TESTS

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s):

Report Date:

1961-08-01

Pagination or Media Count:

1.0

Abstract:

A far-field survey has been conducted to determine the characteristics of the noise generated by the Saturn static firing tests. Data obtained for the first series of eight tests indicate the noise has high power, broad directivity, a low frequency spectrum, and low efficiency. Initial tests were made firing two engines on the first test and four engines on the second test. These tests produced sound power levels of 0.56 megawatt and 1.6 megawatts, respectively, with low efficiencies of 0.047 and 0.06. The remaining six tests were made with eight engines. They produced sound power levels ranging from 25 megawatts to 40 megawatts, with an acoustic efficiency of approximately 0.7. Frequency spectra peaked between 10 cps and 100 cps, with a severe dip at 250 cps and a minor peak at 1000 cps. The effects of impingement on the flame deflector and the dampening of the cooling water make it very difficult to isolate the effects of clustering the engines. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE