Grundlagen der Gasdynamik

Oswatitsch, Klaus

doi:10.1007/978-3-7091-8415-8

Cited by 87 publications

(11 citation statements)

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“…The volumetric gas flow rate emerging from the blowpipe orifice may be approximated by the physical laws valid for a tapered nozzle [3]. Provided that the so-called critical ratio is exceeded (i.e.…”

Section: Blowpipe Orificementioning

confidence: 99%

Collection of fine adhesive and cohesive dusts with pluse‐jet fabric filers

Schmidt

Löffler

1990

Chem Eng & Technol

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The collection of reactive and therefore extremely adhesive and cohesive fine particles (< 1 pm) by means of bag filters with pulse-jet cleaning may present problems. The electron-beam dry scrubbing (EBDS) process, used to remove SO, and NO, in a power plant of the Badenwerk AG, Karlsruhe, serves as an example. To solve the occurring problems and achieve a satisfactory filter performance, extensive know-how of process engineering is necessary. This contribution deals with the following aspects: construction of the cleaning system, selection of filter medium, precoating, and dosage of an auxiliary dust during filtration.

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Section: Blowpipe Orificementioning

confidence: 99%

Collection of fine adhesive and cohesive dusts with pluse‐jet fabric filers

Schmidt

Löffler

1990

Chem Eng & Technol

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“…Dieser Ubergang ist mit einer Unsteti~keit in der zeitlichen Anderung der Temperatur T* bei z := ~ verbunden. Die charakteristische Temperaturdifferenz T2/T 1 = z tritt auch bei der adiabatischen Ffillung eines vollst/indig evakuierten Kessels aus der Atmosph/ire auf [7,8]. Bei diesem Vorgang ist dieses Temperaturverh/iltnis T2/T 1 = ~ yon der Zeit unabh/ingig und trifft deshalb w/ihrend des ganzen Auffiillvorganges zu.…”

Section: Kritischer Zustand Im Engsten Querschnittunclassified

Gasdynamische Untersuchung des Jouleschen Überströmversuches

Bühler

1988

Wärme- und Stoffübertragung

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“…The above homentropic flow model should therefore be a fairly good description of the starting process. The initial values for L' < x < L stated above will therefore be determined with the relations (10) to (13).…”

Section: Initial Conditionsmentioning

confidence: 99%

“…In this region the frictional term is very small and the flow is nearly isentropic, but not homentropic. For a homentropic flow the relations (lo)- ( 13) give roughly twice as steep values of (?p/?x), at the wave front. Figure 7 shows the formtion of the kink during the first 45 seconds after the break.…”

Section: Case 2 Detailed Representation Of the 'Kink'mentioning

confidence: 99%

Unsteady compressible flow in long pipelines following a rupture

Flatt

1986

Numerical Methods in Fluids

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SUMMARYThe unsteady frictional flow of a compressible fluid generated in a long pipeline after an accidental rupture is ofconsiderable interest to the offshore gas industry. It answers several important questions concerning safety and pollution, e.g. the flow rate at the broken pipe end.Laboratory tests cannot simulate the rather complex phenomenon satisfactorily. The problem is highly non-linear and no general analytical solution is yet known.In this study, based on computational fluid dynamics, the simplifying assumptions of isothermal and low Mach number flow often applied in the case of unsteady compressible flows in pipelines, have not been used.Owing to the choking condition ( M a = 1) which prevails for some time at the broken end, and the cumulative effect of friction over the 145 km long pipeline, we obtain (;p/?.~),+ -7". This analytically established singularity leads to numerical difficulties which seriously affect the accuracy. For short tubes (such as shock tubes) this negative feature is much less severe. Special procedures were necessary to keep the accuracy within the chosen limit of I per cent.

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Grundlagen der Gasdynamik

Cited by 87 publications

References 0 publications

Collection of fine adhesive and cohesive dusts with pluse‐jet fabric filers

Collection of fine adhesive and cohesive dusts with pluse‐jet fabric filers

Gasdynamische Untersuchung des Jouleschen Überströmversuches

Unsteady compressible flow in long pipelines following a rupture

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