On the Dynamics of Short Pressure Probes: Some Design Factors Affecting Frequency ResponseNational Aeronautics and Space Administration, 1971 - Frequency response (Electrical engineering) - 25 pages |
From inside the book
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Page 1
... indicate that the Bergh and Tijdeman equations accurately predict the response of probes which in- clude extension tubes for measuring time - average pressure . It is shown that the use of some type of baffle for particle impact ...
... indicate that the Bergh and Tijdeman equations accurately predict the response of probes which in- clude extension tubes for measuring time - average pressure . It is shown that the use of some type of baffle for particle impact ...
Page 5
... indicate that the re- sonant frequency is slightly dependent on probe diameter . For the two probe diameters tested in this program , the resonant frequency for the same length and volume ratio dif- fered by approximately 3 percent ...
... indicate that the re- sonant frequency is slightly dependent on probe diameter . For the two probe diameters tested in this program , the resonant frequency for the same length and volume ratio dif- fered by approximately 3 percent ...
Page 6
... indicates that the basic response of the probe has not been altered by the right angle transducer mount . The Effects of Average Pressure Tubing on Probe Response The response of probes with two different sizes of average pressure ...
... indicates that the basic response of the probe has not been altered by the right angle transducer mount . The Effects of Average Pressure Tubing on Probe Response The response of probes with two different sizes of average pressure ...
Page 8
... indicate that , if the entrance annulus and hole areas are larger than the probe tube area , this baffle con- figuration does not degrade the frequency response of the probe . The slight increase in resonant frequency with increasing ...
... indicate that , if the entrance annulus and hole areas are larger than the probe tube area , this baffle con- figuration does not degrade the frequency response of the probe . The slight increase in resonant frequency with increasing ...
Common terms and phrases
150-centimeter inside diameter A2 probes airstream AMPRES COMMON/XFREQ/FREQ COMPLEX Analytical curve ref Annulus area to tube atmospheric pressure average pressure tube average total pressure baffled probe configurations Bergh and Tijdeman BESSEL FUNCTION COMMON/THERMO/GAMMA,P Computer curve with end cyclic deviations decibels DECK COMPLEX FUNCTION deg Amplitude ratio deviations in amplitude diam end correction ref experimental FREQ frequency response geometry parameter hertz kilohertz Lewis Research Center measured response measuring systems particle impact protection percent phase angle predict pressure transducer pressure tube diameter probe design probe diameter probe geometry probe response probe tested probe which includes quarter wavelength equation reduction in resonant resonant frequency response of probes RETURN END IBFTC ROUTINE CALCULATES shown in figure specific heat ratio standing waves straight probe TERM3 Tijdeman equations Tijdeman ref total pressure probes transducer Cavity volume transient total pressure tube and volume tube area tube length turbojet variations in amplitude volume ratio XQSUM(K