Mechanics
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ISSN 1734-8927
e-ISSN: 2300-7060
Issue Date
2006
Volume
Vol. 25
Number
No. 1
Description
Journal Volume
Mechanics
Vol. 25 (2006)
Projects
Pages
Articles
Experimental verification of theoretical work of rotor
(Wydawnictwa AGH, 2006) Fortuna, Stanisław
The article presents results of the flow tests of a fan without casing based on calculations of increase of energy in rotor, efficiency and power on the drive shaft as well as thermoanemometric measurements behind the rotor. Results of the tests were compared with whirl work calculated analytically aiming at improvement of analytic calculations.
Exergetische Betrachtung einer Gasturbinenschaltung als eines verallgemeinerten energetischen Systems
(Wydawnictwa AGH, 2006) Kozaczka, Jarosław
Detailed method of modeling has been presented, which is aimed for thermodynamic analyzes and rating of power systems. As an example the gas turbine scheme with heat recovery was discussed. The gas fuel is methane and hydrogen, treated as perfect gases. The numerical calculations based on the derivations and algorithms have been given, which were presented in author's farmer papers. The described method can be applied to the more complicated power structures, especially to systems with CO2-poor combustion processes.
Minimalizacja drgań obiektu poprzez dobór optymalnych parametrów inercjalno-sprężystych układu ciągłego
(Wydawnictwa AGH, 2006) Majkut, Leszek
The work concerns the problem of optimum selection of inertial (the product of the beam material density and i cross section A) and springy (bending rigidity El) parameters of the beam. The objective function is transmissibility coefficient for given excitation frequency. Restrictive conditions were accepted: exciting frequency is lying between first and third natural frequency of the continuous system, and deflection of beam in gravitational field was, less than the given value.
Mass optimisation of the vibroinsulating frame of a short vibratory conveyer
(Wydawnictwa AGH, 2006) Czubak, Piotr
Short vibratory conveyers placed on vibroinsulating frames were analysed in the paper. It has been shown, on the basis of the double-mass model, that conveyers can be placed on frames of masses smaller than the mass of the trough and the significant reduction of forces transmitted to the foundation can be achieved. The equation allowing to compare the force transmitted to the foundation by the conveyer without the frame placed directly on the system of leaf springs with the force transmitted by the vibroinsulated conveyer was determined in the paper.
Analiza cieplno-wytrzymałościowa połączenia walczaka i rury opadowej w warunkach nieustalonych
(Wydawnictwa AGH, 2006) Taler, Jan; Michalczyk, Krzysztof
In this paper the method based on German standard TRD of calculating acceptable speed of heating and cooling power boilers was presented. It was indicated that stresses occurring during heating and cooling according to this standard are much smaller than the acceptable ones. It motivates shortening of starting and shutting-down times and searching for new methods defining acceptable speeds of heating and cooling power boilers.