Marian-Dumitru NEDELONI


32-7 CONCEPEREA ȘI DESCRIEREA SISTEMULUI DE ACȚIONARE ȘI REGLARE AL UNEI MICROTURBINE HIDRAULICE CROSS-FLOW

DESIGN AND DESCRIPTION OF AN DRIVE AND REGULATION SYSTEM AT A CROSS-FLOW MICROHYDROTURBINE

 

This paper presents beside the practical concepts, also theoretical calculation to establish and define basic design of a drive and regulation system used regularity to micro-hydro turbine, specifically Cross-Flow. Virtual 3D designed are most modern models solutions and hydraulic drawing was used with success to achieve physical models by execution drawings.

 

Keywords: Cross-flow micro turbine, runner, flow, governor, flaps

Cuvinte cheie: micoturbină Cross-flow, rotor, debit, regulator de viteză, clapete

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29-88 LUCRUL CU PROGRAMUL SOLIDWORKS PENTRU CALCULUL FRECVENŢEI PROPRII A UNUI CUB UTILIZÂND STUDIUL DE TIP „FRECVENŢĂ”

WORKING WITH SOLIDWORKS SOFTWARE FOR THE
CALCULATION OF NATURAL FREQUENCY OF A CUBE
USING THE „FREQUENCY” TYPE STUDY
This paper presents the work with SolidWorks software regarding the
Simulation module respectively the „Frequency” type study. This type of study will
highlight the calculation and results for the natural frequency of vibration modes for
a cube with the side of 50 mm. To see how the natural frequency values can be
change, different geometries of the same designed 3D cube will be make.
Keywords: SolidWorks software, study, natural frequencies, cube
Cuvinte cheie: programul SolidWorks, studiu, frecvenţe proprii, cub

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20-37 CALCULUL FORŢEI AERODINAMICE ŞI DISTRIBUŢIEI DE PRESIUNI PENTRU UN COŞ VERTICAL

AERODYNAMIC FORCE AND PRESSURE DISTRIBUTION
CALCULUS FOR A VERTICAL FUNNEL
The objective of the application is to determine the aerodynamic force
and pressure distribution resulted from wind action applied on a vertical funnel with
diameter D = Ø3 m and height H = 54 m. The velocity of the air stream is 20 m/s
and air density is 1.2 kg/m3. The objective of the application is to compare the
results predicted by Solid Works Flow Simulation with experimental data.
Keywords: aerodynamic forces, pressure distribution, Flow Simulation
Cuvinte cheie: forţă aerodinamică, distribuţie presiuni, Flow Simulation

37 CALCULUL FORŢEI AERODINAMICE ŞI DISTRIBUŢIEI


24-12 TESTAREA COMPORTAMENTULUI LA EROZIUNE CAVITAŢIONALĂ A UNUI ALIAJ NEFEROS CU 88 % ALUMINIU

CAVITATION EROSION BEHAVIOR TESTING OF A NON
FERROUS ALLOY WITH 88 % ALUMINIUM
This paper presents cavitation erosion behaviour testing of the
nonferrous alloys AlSi12 with 88 % Aluminium. Vibratory cavitation tests were
made on a cavitation stand in the laboratory, using the stationary specimen
method. This alloy is not subject to cavitation erosion in practical applications,
as is the stainless steels used in hydraulic turbines, but the experimental
research highlight the behaviour of a material (AlSi12, in this case) when the
period of time testing are different. Research results are presented through
graphs and representative images.
Cuvinte cheie: eroziune cavitaţională, compoziţie chimică, macrostructură
Keywords: cavitation erosion, chemical composition, macrostructure

12 TESTAREA COMPORTAMENTULUI LA EROZIUNE CAVITAŢIONALĂ A UNUI ALIAJ NEFEROS