Pressure probe

Chile [Prog. Aerosp. Sc7, 16, 147-223 (1975)] reviews the use of the pitot tube and allied pressure probes for impact pressure, static pressure, dynamic pressure, flow direction and local velocity, sldn friction, and flow measurements. 

Pressure probes. Pressure monitors or transducers may be of use in corrosion monitoring in environments where buildup of gases such as hydrogen or H9S may contribute to corrosion. 

At each of the measurement locations, pressure probes may be attached to a harness, and these probes will direct the air flow to external pressure transducers for measurement while serving as a sheath for the appropriate thermocouple at that location (each thermocouple will be seated inside a pressure probe). 

By using dynamie pressure probes in the bleed ehamber, it is possible to deteet tip stall. A pressure rake at the eompressor exit enables aeeurate readings of exit pressure and is also helpful in the diagnosis of eompressor stall. 

Gas-pfeife, /. gas pipe, -pressuag, /. gas pressure. -probe, /. gas test gas testing gas sample, -priifer, m. gas tester eudiometer, -quelle, /. gas well, -raum, m. gas volume, volume of gas. 

Bray KL (2001) High Pressure Probes of Electronic Structure and Luminescence Properties of Transition Metal and Lanthanide Systems. 213 1-94 Bronstein LM (2003) Nanoparticles Made in Mesoporous Solids. 226 55-89 Bronstrup M (2003) High Throughput Mass Spectrometry for Compound Characterization in Drug Discovery. 225 275-294... 

Turgor pressure of single leaf cells was measured by an improved version of the cell pressure probe according to Husken et al. (7). Mikrocapillaries were pulled on a laser heated pulling device. 

Pt(H20) + -H2 0 "0 255. High pressure probe allows determination of AK. Could also use >55pt 256 jjjjj jjQj 25 accurate. 

The toroidal pressure probe, introduced in 1989 by Rathke and coworkers [249, 250], has been modified by Woelk and coworkers [249, 251], who have used a toroid cavity NMR autoclave for high pressure PHIP NMR experiments. Figure 1.43 shows the PHIP spectrum of the [Rh(norbornadiene)(PPh3)2]PF6-catalyzed hydrogenation of 1,4-diphenylbutadiyne with 40 bar of 50% emiched para-H2 [252]. The spectrum from the same reaction at ambient H2 pressure is shown in the inset [253]. The two absorption/emission PHIP patterns in both spectra indicate that para-H2 is transferred pairwise during the catalytic cycle. 

There are an increasing number of applications of high pressure NMR in supercritical fluids to homogeneous catalysis [266]. Using their toroidal pressure probe, Rathke and coworkers [249, 267-269] have extensively studied the Co2(CO)g-cata-lyzed hydroformylation of olefins in scCOj (Eq. (14)). The hydrogenation of Co2(CO)g (Eq. (15)) is a key step in this reaction. 

To measure the effect of pressure on structures and dynamics, a good stability and homogeneity of the sample temperature has to be guaranteed. Therefore, variable pressure probes for high resolution NMR are in general thermostatted by... 

Fig 2 Charge Configuration Used to Compare Pressure Probe System with the Ioniza-tion Probe System. The Barrier Introduces a Detonation Delay Time... 

A comparison of the ionization and pressure probe systems in a single test provides some insight into the initiation of a porous bed of granular expls by relatively weak shock waves. A typical exptl arrangement and the oscillograms produced are shown in Fig 5 of the report, which is reproduced here as Fig 2, without oscillograms... 

A 3rd series of tests was made on attenuators composed of cellulose acetate cards (2-inch diam by 0.01-inch thickness) and Lucite disks (2-inch diam by 0.50- or 1.0-inch length). The shock velocity in this composite gap was followed by the pressure probes. This test proved that the composite gap and the Lucite gap are comparable... 

Jaffe et al (Ref 3), in the course of determination of the shock pressure required to initiate detonation of an acceptor in the shock sensitivity test, found that the velocity of the front as sensed by the pressure probe method, falls behind the true velocity of the shock front as the shock is attenuated. It has also been found that the maximum transmitted shock velocity generated by the two Tetryl pellets and measured in Lucite is 4.6mm/frsec. Shock velocities determined by optical method, shown in Table 3, p 25, run between 2.701... 

Bray KL (2001) High Pressure Probes of Electronic Structure and Luminescence Properties of Transition Metal and Lanthanide Systems. 213 1-94... 

If the fluid to be sampled is liquid which is to be vaporised, or is a gas at high pressure, then a narrow bore pipe (typically 2 mm ID) is inserted through the original low pressure probe (Fig. 6.59b). 

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