Results 11 to 20 of about 147 (129)
Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement
Geophysical Monograph Series, Page 27-82., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm +2 more
wiley +1 more source
An experimental study of the oscillations in a flue organ pipe [PDF]
The Journal of the Acoustical Society of America, 1990 Stationary oscillations of a simple flux-type organ pipe have been studied. Internal acoustical pressure measurements in combination with modification of pipe geometry indicate that the sound source at the labium is a dipole. This observation is explained by Coltman's analysis [J. Acoust. Soc. Am. 60, 725–733 (1976)].
A. P. J. Wijnands +5 more
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Tone Production in the Organ Flue Pipe [PDF]
The Journal of the Acoustical Society of America, 1955 A number of measurements have been made of middle C open diapason organ pipes during variation of the voicing adjustments. The effect on the spectrum and on the initial transient of alterations in height of mouth, languid setting, and wind pressure are presented. The effect of nicking is shown to be a decrease in the random noise background.
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Attack transient of a flue organ pipe
, 1993 Flow visualizations of the jet formation during the initial phase of the attack transient in a flue organ pipe are presented. These visualizations are related to acoustical pressure measurements inside the pipe. This acoustical response appears to be extremely sensitive to the steepness of the rise of the supply pressure in the foot of the pipe. A fast
Mahu, W.E.A. +5 more
openaire +2 more sources
Acta AcusticaRecent numerical studies showed that the foot of flue organ pipes closed at one end acts as a Helmholtz resonator and influences the acoustic oscillation in the pipe.
Ikoga Shiryu +5 more
doaj +1 more source
Acta AcusticaThis study evaluates end-correction behavior in flue organ pipes by comparing two models: the classical low-frequency expression of Levine and Schwinger and the empirical, frequency-dependent refinement of Davies et al.
Coyle Whitney L. +4 more
doaj +1 more source
Catalytic Oxidation of CO and VOC in Flue Gas of Coffee Roasting Machines
Chemie Ingenieur Technik, EarlyView.Platinum‐coated cordierite monoliths effectively oxidized CO and VOC in coffee roasting exhaust with higher Pt loadings lowering light‐off temperatures. Scaled up 90 g/ft3 catalyst in a 5 kg roaster achieved 96% CO and around 78% VOC conversion at 350°C, highlighting stable operation requires flue gas temperatures ≥350°C.
Till Hauswald +3 more
wiley +1 more source
Selective Non‐Catalytic Reduction of NOx in the Exhaust Gas of Small Wood Gasification Boilers
Chemie Ingenieur Technik, EarlyView.Kinetic studies of the SNCR reaction were conducted to investigate NOx reduction in the exhaust gas of small‐scale wood gasification boilers. Both the experimental results and the derived global kinetic model indicate that SNCR can achieve a significant reduction in NOx emissions under typical operating conditions. ABSTRACT The gas‐phase reaction of NO
Alexander Groß, Sven Kureti
wiley +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Abstract This work presents a simplified extended‐batch adsorber analogue model (e‐BAAM) to quantify key performance metrics such as purity, recovery, and energy trends for various pressure swing adsorption (PSA) process cycles for CO2$$ {\mathrm{CO}}_2 $$ capture.
Gwyneth Liske, Arvind Rajendran
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Experimental methods in chemical engineering: Temperature‐programmed oxidation—TPO
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Temperature‐programmed oxidation (TPO) probes the oxidative capacity and redox properties of solid materials—catalysts, metal oxides, perovskites, and carbonaceous deposits. It identifies coke type, distribution, and reactivity. TPO instruments pass an oxidizing gas (diluted O2$$ {\mathrm{O}}_2 $$, air, or less commonly N2O$$ {\mathrm{N}}_2 ...
Gholamreza Roohollahi +7 more
wiley +1 more source