National Repository of Grey Literature 49 records found  beginprevious30 - 39next  jump to record: Search took 0.01 seconds. 
Directional sensitivity of the hot-wire probes - effect of the geometry and Re
Antoš, Pavel ; Mazur, Oton ; Uruba, Václav
Paper deals with the directional sensitivity of the hot-wire probe. A number of probes with different geometry were experimentally investigated at various Re numbers. Results of the directional function are discussed in detail.
EFFECT OF HOT-WIRE PROBE GEOMETRY ON THE DIRECTIONAL SENSITIVITY
Antoš, Pavel ; Mazur, Oton ; Uruba, Václav
Paper deals with the directional sensitivity of the hot-wire probe. A number of probes with different geometry were experimentally investigated at various Re number. The satisfactory form of directional function is discussed.
Simultaneous measurement of velocity and temperature with two-sensor hot-wire probe
Antoš, Pavel
The paper deals with simultanenous measurement of both velocity and temperature by means of two sensor hot-wire probe. The effect of dynamic adjustment on the behaviour of constant-temperature anemometer at low overheats is crucial.
Nestacionární charakteristiky rovinného paprsku, vstřikovaného do korátkové kavity
Knob, Martin ; Uruba, Václav ; Antoš, Pavel ; Popelka, Lukáš ; Šafařík, Pavel ; Adamec, J.
In the article, the results of the biorthogonal decomposition of a 2D TR PIV data of a jet impinging into a trough cavity, are presented. The obtained spatiotemporal structure is shown and its physical meaning is clearly explained.
Applicability Of The Heat-Transfer Law In Hot-Wire Anemometry
Antoš, Pavel
Paper deals with the heat transfer from the hot-wire to the fluid, namely at low overheats. Various heat-transfer laws for this case have been investigated. The use of generalized form of the Collis-Williams law for common probes at middle and low overheats has been discussed in detail.
CTA measurements at low overheats
Antoš, Pavel
The static dependence of the output anemometer voltage on the gain and the offset voltage of the amplifier was investigated experimentally. The DISA CTA bridge 55M10 was examined. Data were compared to the measurements performed at a Wheatston bridge without any amplifier.
Interpretace měření CTA anemometrem při nízkém žhavení
Antoš, Pavel
The paper deals with an effect of dynamic adjustment on the behaviour of constant-temperature anemometer. The static dependence of the output anemometer voltage on the gain and the offset voltage of the amplifier was investigated experimentally. Applied model of the CTA feedback system fits the behaviour of the bridge satisfactory.
Experimentální a numerické vyšetřování nestacionárního chování impaktního proudu do korýtkové kavity
Knob, Martin ; Antoš, Pavel ; Adamec, J.
In this contribution, the unsteady behaviour of a jet impinging into a trough- like shaped cavity is discussed; the investigation is performed both experimentally and numerically. The unsteady character of this flow is considered a result of instability in otherwise symmetrical flow- field. The mechanism of the jet swinging is then identified as an action of the Coanda effect between a jet and a quasi- wall- jet.
Heat loss of the hot-wire at low overheats
Antoš, Pavel
Collis-Williams cooling law seems not to be suitable for a wide range of the operation wire temperatures. A new form of the cooling law has been proposed for low-overheated wires.
Reference Film Temperature in the Hot-wire Anemometry
Antoš, Pavel
Dimensionless parameters in the cooling law are referred to the reference film temperature. In case of the mean film temperature there is necessary to use a temperature loading factor. There were found such reference temperatures that the loading factor is eliminated.

National Repository of Grey Literature : 49 records found   beginprevious30 - 39next  jump to record:
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31 Antoš, Pavel
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