September 27-28, 2012, Düsseldorf, Germany
CST as active member of European Forum for Reciprocating Compressors is proud to invite you to the "International Rotation Equipment Conference on Pumps and Compressors" that will be held in Düsseldorf on next September 27th and 28th.
This year the event includes:
- 8th European Forum for Reciprocation Compressor (EFRC)
- 3rd Compressor User International Forum (CIF)
- 10th Pump User International Forum (PIF)
CST will present a very interesting paper:
September 27th h 11.00 room 26: “Non linear multi-axial fatigue analysis of a threaded crosshead to piston rod connection of a reciprocating compressor using the Brown Miller algorithm”
Presented by Riccardo Traversari our Rotating Machinery Design Dept. Manager
It will be a pleasure to welcome you !
Here you will find the two days program: http://www.introequipcon.com/uploads/media/Programme_2012.pdf
For registrations please check:
June 27-29, 2011, Milan, Italy
ASME 2011 World Conference on Innovative Virtual Reality (WINVR2011)
Virtual Prototyping technique applied to the design of a process reciprocating compressor
Virtual Prototyping (VP) reproduces a complete machine to test it several times, as a scale 1:1 laboratory prototype. VP utilizes various CAE tools, such as 3D modelling, Structural FEA, Multibody Dynamic Analysis (MDA), Multiaxial fatigue analysis, and Fluid Structure Interaction (FSI) in an integrated way. The VP of a rotating machine allows considering a realistic stepless loading pattern throughout the complete revolution and determining automatically the fatigue safety factors within the whole machine structural assembly, while FSI allows dealing simultaneously with thermodynamic, motion and deformation phenomena. This approach was used to review the design of the crank mechanism and cylinders of an existing reciprocating compressor. The loads (including inertia forces) were applied to the gudgeon pin and, by means of the MDA, to all the other components. An advanced approach, based on Fluid Structure Interaction (FSI) analysis, was applied for the thermodynamic analysis of the cylinder’s efficiency. A 3D CFD Model, simulating the cylinder with mobile piston and valves, was developed and experimentally validated. The 3D domain simulating the compression chamber changes with the piston motion law while valve rings move according to the fluid dynamic forces.
July 17- 21, 2011, Baltimore, Maryland, United States
ASME 2011 Pressure Vessels and Piping Conference (PVP)
Thermo-fluid-dynamic design of Reciprocating
Compressor Cylinders by Fluid Structure Interaction (FSI)
Pressure losses at the cylinder valves of reciprocating compressors are generally calculated by the classical equation of the flow through an orifice, with flow coefficient determined in steady conditions. Rotational speed has increased in the last decade to reduce compressor physical dimensions, weight and cost. Cylinder valves and associated gas passages became then more and more critical, as they determine specific consumption and throughput. An advanced approach, based on the new Fluid Structure Interaction (FSI) software, which allows to deal simultaneously with thermodynamic, motion and deformation phenomena, was utilized to simulate the complex situation that occurs in a reciprocating compressor cylinder during the motion of the piston. In particular, the pressure loss through valves, ducts and manifolds was investigated. A 3D CFD Model, simulating a cylinder with suction and discharge valves, was developed and experimentally validated. The analysis was performed in transient and turbulent condition, with compressible fluid, utilizing a deformable mesh. The 3D domain simulating the compression chamber was considered variable with the law of motion of the piston and the valve rings mobile according to the fluid dynamic forces acting on them. This procedure is particularly useful for an accurate valve loss evaluation in case of high speed compressors and heavy gases. Also very high pressure cylinders, including LDPE applications, where the ducts are very small and MW close to the water one, can benefit from the new method.