HYDRAULIC SYSTEMS DESIGN RESEARCH GROUP

Transcript

1 HYDRAULIC SYSTEMS DESIGN RESEARCH GROUP DEPARTMENT OF SCIENCES AND METHODS FOR ENGINEERING UNIVERSITY OF MODENA AND REGGIO EMILIA

2 AN INNOVATIVE THEORY FOR THE STUDY OF NON-IDEAL FLUIDS FOR FLUID POWER APPLICATIONS NON IDEAL FLUIDS THEORETICAL APPROACH VISCOSITY ELASTICITY FLUID MODEL FLUID MEMORY FLUID RELAXATION YOGURT STRESS: NUMERICAL VS. EXPERIMENTAL COMPARISON NUMERICAL RESULTS APPLICATION FIELDS CERAMIC APPLICATION: FOOD INDUSTRY ALIMENTARY HYDRAULIC ELASTOMERIC AND POLYMERIC

3 FLUID-DYNAMICS ANALYSIS OF A TRANSMISSION SYSTEM FOR MEDIUM SIZED POWER TRACTORS NUMERICAL MODEL OF THE TRANSMISSION SYSTEM PS3 55/30 PS1 46/39 PS2 37/26 Lubrication layout Reverse 46/39 LMS Imagine.Lab AMESim rev9.1 A CLUTCHES CONTROL VALVE PTO BRAKE CONTROL VALVE A P T P T

4 MODELING AND TESTING DUAL CLUTCH TRANSMISSIONS FOR Dual Clutch Clutch Plates Spring Actuator Even Gears Shaft Odd Gears Shaft HIGH PERFORMANCE VEHICLES Drain P Drain P A T A F F spring solenoid Solenoid Valve F pressure Experimental Testing T Clutch K1 Odd Gears Clutch K2 Even Gears Clutch Control Plate (CCP) Syncro Actuation Plate (SAP)

5 VOLUMETRIC ORBIT PUMP CAE ANALYSIS AND PERFORMANCE IMPROVEMENT 11 CHAMBERS 10 CHAMBERS INFLUENCE OF THE CHAMBER FLOW AREAS

6 DEPT. OF ENGINEERING SCIENCES & METHODS UNIV. OF MODENA & REGGIO EMILIA MODELING THE AXIAL BALANCING MECHANISM OF ORBIT ANNULAR HYDRAULIC MACHINES EQUIVALENT MASS EQUIVA LENT SPRING EQUIVAL NUMERICAL VS. EXPERIMENTAL COMPARISON ENT INERTIA β=0deg β=-10deg β=-20deg β=-40deg β=-50deg DRA IN CLEARANCES OPERATING MAP Θ=0deg β=-30deg

7 SPLASH LUBRICATION: VOF approach + CHIMERA mesh Gear box lubrication and cooling:

8 VM Motori S.p.A. Cento, Ferrara (Italy) DEPT. OF ENGINEERING SCIENCES & METHODS UNIV. OF MODENA & REGGIO EMILIA A LUMPED PARAMETER APPROACH FOR THE SIMULATION OF ICE COOLING SYSTEMS ICE Pressurized liquid cooling circuits Cooling circuit numerical model Cooling circuit test rig assembly Piezo-resistive pressure gauges Magnetic flow meters Flow rates distribution Flow rate values are expressed in l/min

9 STUDY OF ELECTRO-PNEUMATIC COMPONENTS Pressure Distribution FOR CNG INJECTION SYSTEMS Filling Nozzle Up to 250 [bar] Tank Valve Velocity Field CFD results Velocity Field m CNG 1.0[ g / s] 2 7 [bar] CFD results Discharge Coefficient Injection System Pressure Control Device Thermographic Analysis

10 MULTI-COMPONENT FLOW: VOF approach Multi-fuel injection systems: Low pressure fuel accumulator Fuel switch over from E21 to E100 courtesy of Tetra-Fuel injection system

11 FLOW FORCES EFFECTS: Moving grid (GGI approach) Hydraulic valve spool motion: C d A Q in 2 p OUTLET INLET Moving Mesh 0.01 mm

12 DEPT. OF ENGINEERING SCIENCES & METHODS UNIV. OF MODENA & REGGIO EMILIA OPTIMIZATION OF PACKAGING MACHINES FOR LIQUID FOOD Air Sterile System Filling System Lumped parameters analysis Super heater detailed model O U T L E T HOT_INL ET COLD_INLET A-Valve Flow meter AMESim v.9 SL1 by Regulating Valve Change Over Valve Float with pressure flange Packaging material tube Δp = 0.1 bar T = 293 K Arif = mm2 CFD analysis 80 deg 90 deg 100 deg 110 deg 120 deg 130 deg 140 deg 150 deg 160 deg Experimental Analysis Jaw System Actuation Unit: Jaw System Left hooks Test rig cooling system Left arm Supply and Control Units Paper cutters Right arm Right hooks Cooling valve control system

13 NON-NEWTONIAN FLUIDS: Herschel Bulkley approach Ceramic spray pump:

14 SPRAY FORMATION: Eulerian approach Liquid aluminum injection: ALUMINUM = ENERGY CARRIER STEAM GENERATOR H 2 O (g) H 2 (g) + H 2 O (g) H 2 SEPARATION SYSTEM H 2 HEAT 2Al + 3H 2 O Al 2 O 3 + 3H 2

15 SOLID PHASE TRANSPORT: DEM approach Coffee Roasting: Preheating drum Plenum at the roasting drum outlet ṁ in,coffee = 250Nm 3 /h ṁ in,coffee = 350Nm 3 /h ṁ in,coffee = 500Nm 3 /h