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Compressor machine units modeling - Altair University...Compressor machine units modeling Ilgizar...
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Compressor machine units modeling Ilgizar SAGBIEV, Timur MAKSIMOV, Rustem SHARAFEEV KAZAN NATIONAL RESEARCH TECHNOLOGICAL UNIVERSITY, RUSSIA, KAZAN The Department COMPRESSOR MACHINES AND UNITS (CMU) was established in 1963 KAZAN NATIONAL RESEARCH TECHNOLOGICAL UNIVERSITY (KNRTU) is one of the oldest technological universities in Russia. Its history dates back to 1890 The Department includes the COMPUTER LABORATORY. Modern software is available for students and Faculty to carry out calculation, drawing and three-dimensional modeling The Department collaborate with compressor plants and Special Design Bureau for compressor manufacturing, also with the largest energy companies such as «Gazprom» and «Rosneft» in research and advanced training of specialists HyperWorks is used in: - Bachelor Degree program "Vacuum and Compressor Engineering of Physical Units"; - Master Degree program "Energy-Efficient Compressor Units and Gas-Pumping Units for Gas Processing and Transportation". Academics: In 2015 first Bachelors studying HyperWorks graduated Radial displacement : 0.17 mm Axial displacement : 0.07 mm Von Mises stress 580 MPa CONTEXT & OBJECTIVE: High-pressure gas is one of the important resource of industry. This fact determine development of economy compressor systems. At chemical plants for compression and transportation of different gases turbocompressors are widespead. One of ways of efficiency enhancement is remodeling through flow part. This work is devoted to design of turbocompressor for hydrogenous gas with initial pressure about 3,9 MPa, terminal pressure 5,4 MPa, initial temperature 20°C, gas flow rate 41 m 3 /min. As analog one-section six-stage centrifugal compressor was chosen. Its initial pressure about 4,0 MPa, terminal pressure 5,9 MPa, initial temperature 20°C, gas flow rate 61 m 3 /min, rotation frequency per minute 13 000. According to thermogas dynamic calculation through flow part of compressor was remade: reduced quantity of compression stage from 6 to 4, added vaned diffuser, some increased rotation frequency per minute to 13 200, changed wheels geometry. Outer diameter and shaft diameter were kept as at analog. METHOD: Centrifugal wheel strength check was carried out with OptiStruct (developed by ALTAIR). Rust-resisting steel (С 0.7%, Cr 16%, Ni 6%) was chosen as the material. In strength analysis permissible limit [σ] was equal yield stress σ 0,2 because of steel is plastic solid. For the chosen steel σ 0,2 = 950MPa. In reliability analysis for the chosen steel recommended load factor [k] ≥1.3. RESULTS: It was found that for centrifugal wheel of 1st compression stage: - max value of displacements: radial 0.17 mm, axial 0.07 mm. This provide safety clearance between wheel and compressor casing. - max value of Von Mises stress: σ m = 580 МPa. Strength condition is satisfied: σ m <[σ], (580 MPa < 950 MPa). Load factor k = [σ] / σ m = 950/580 = 1.64. Reliability condition is satisfied: k > [k] (1.64 > 1.3). Result: The designed centrifugal wheel is efficient in the required compressor operating mode.
Transcript of Compressor machine units modeling - Altair University...Compressor machine units modeling Ilgizar...
Compressor machine units modelingIlgizar SAGBIEV, Timur MAKSIMOV, Rustem SHARAFEEV KAZAN NATIONAL RESEARCH TECHNOLOGICAL UNIVERSITY, RUSSIA, KAZAN
The Department COMPRESSOR MACHINES AND UNITS (CMU) was established in 1963 KAZAN NATIONAL RESEARCH TECHNOLOGICAL UNIVERSITY (KNRTU)
is one of the oldest technological universities in Russia.Its history dates back to 1890
The Department includes the COMPUTER LABORATORY. Modern software is available for students and Faculty to carry
out calculation, drawing and three-dimensional modeling
The Department collaborate with compressor plants and Special Design Bureau for compressor manufacturing,
also with the largest energy companies such as «Gazprom» and «Rosneft»in research and advanced training of specialists
HyperWorks is used in:- Bachelor Degree program "Vacuum and Compressor Engineering of Physical Units";- Master Degree program "Energy-Efficient Compressor Units and Gas-Pumping Units for Gas Processing and Transportation".
Academics:
In 2015 first Bachelors studying HyperWorks graduated
Radial displacement : 0.17 mm
Axial displacement : 0.07 mm
Von Mises stress580 MPa
CONTEXT & OBJECTIVE:
High-pressure gas is one of the importantresource of industry. This fact determinedevelopment of economy compressor systems. Atchemical plants for compression andtransportation of different gases turbocompressorsare widespead. One of ways of efficiencyenhancement is remodeling through flow part.
This work is devoted to design ofturbocompressor for hydrogenous gas with initialpressure about 3,9 MPa, terminal pressure5,4 MPa, initial temperature 20°C, gas flow rate41 m3/min.
As analog one-section six-stage centrifugalcompressor was chosen. Its initial pressure about4,0 MPa, terminal pressure 5,9 MPa, initialtemperature 20°C, gas flow rate 61 m3/min,rotation frequency per minute 13 000.
According to thermogas dynamic calculationthrough flow part of compressor was remade:reduced quantity of compression stage from 6 to4, added vaned diffuser, some increased rotationfrequency per minute to 13 200, changed wheelsgeometry. Outer diameter and shaft diameterwere kept as at analog.
METHOD:
Centrifugal wheel strength check was carriedout with OptiStruct (developed by ALTAIR).
Rust-resisting steel (С 0.7%, Cr 16%, Ni 6%)was chosen as the material. In strength analysispermissible limit [σ] was equal yield stress σ0,2
because of steel is plastic solid. For the chosensteel σ0,2 = 950MPa. In reliability analysis for thechosen steel recommended load factor [k] ≥1.3.
RESULTS:
It was found that for centrifugal wheel of 1stcompression stage:
- max value of displacements:radial 0.17 mm, axial 0.07 mm.This provide safety clearance between wheel
and compressor casing.- max value of Von Mises stress:σm = 580 МPa.Strength condition is satisfied:σm < [σ], (580 MPa < 950 MPa).Load factor k = [σ] / σm = 950/580 = 1.64.Reliability condition is satisfied:k > [k] (1.64 > 1.3).
Result: The designed centrifugal wheel isefficient in the required compressor operatingmode.
