On the Dynamics of Short Pressure Probes: Some Design Factors Affecting Frequency ResponseNational Aeronautics and Space Administration, 1971 - Frequency response (Electrical engineering) - 25 pages |
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