Compressor Piping Design Effect on Vibration Data

Suryadi, Aji; Yanuar,; Gunawan, .

doi:10.37934/arfmts.88.1.94108

Cited by 3 publications

(3 citation statements)

References 24 publications

(24 reference statements)

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“…To reduce the vibration intensity, several recommendations have been made to minimize the vibration to an acceptable level under the requirement as per the Energy Institute (EI) guidelines handbook [4]. This includes by adding piping component such as valve [5] or using non-standard fitting connection to replace the previous standard equals tee, which able to ease the fluids flow. Nonetheless, the design and development of non-standard Y-tee fittings connections in the piping system are not exclusively specified in any of the ASME standards.…”

Section: Introductionmentioning

confidence: 99%

Stress Classification Lines for Non-Standard Y-Tee Design in Piping System

Faizul Azly Abd Dzubir,

Abdul Rahim Othman,

Muhammad Firdaus Othman

2023

ARASET

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All processes fluids in the oil and gas industry are generally transferred from one point to another via complex piping networks. The process temperature and the pressure of the fluids may vary between -21 °C to 816 °C and from atmospheric, 1.013 barg to 431 barg, respectively. Under these conditions, the entire piping networks are exposed to thermal expansion and contraction resulting in mechanical bending, potentially causing mechanical failures. The most common pipe fitting used in piping networks to divide the fluid flow into two different directions would be a standard equal tee which was designed in accordance with ASME B16.9. The equal tee, however, has distinctive flexibility characteristics compared to the pipe, which is well defined in ASME B31.3. These flexibility characteristics generate a stress intensification factor (SIF) through bending moment equations for beam-type element analysis for standard equal tee components. However, due to the limitation of SIF and flexibility characteristics for the non-standard pipe fittings, the stress evaluation could not be done using beam-type element analysis. When using finite element method (FEM) analysis, generally equivalent stresses (Von Mises or Tresca) or principal stresses would be evaluated depending on the stress categorization as explained in ASME codes and standards. In this paper, a stress evaluation method for non-standard Y-tee was developed and demonstrated against ASME VIII Div. 2 Part 5 requirement. The developed SCLs line for the non-standard Y-tee fittings provides the guides for stress assessment against design stress allowable. An optimum design for non-standard Y-tee is proposed at 45° and 60° crotch radii which resulted in lower stress value at SCL lines, hence improving the structural integrity.

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Section: Introductionmentioning

confidence: 99%

Stress Classification Lines for Non-Standard Y-Tee Design in Piping System

Faizul Azly Abd Dzubir,

Abdul Rahim Othman,

Muhammad Firdaus Othman

2023

ARASET

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“…Among the primary parameters that significantly impact a structure's serviceability are its natural frequencies and mode shapes. When an external vibration coincides with one of the natural frequencies of laminated composites, a resonant phenomenon develops [4], resulting in catastrophic failure of the structure. Thus, a thorough examination would be necessary prior to the final laminate design.…”

Section: Introductionmentioning

confidence: 99%

Natural Frequencies Optimisation of Hybrid Composite Laminates using Response Surface Method

Muhammad Hadri Mohd Rosaidi,

Jamaluddin Mahmud,

Siti Mariam Abdul Rahman

et al. 2023

ARASET

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Natural frequency is an important property in designing structures, as resonance can induce catastrophic failure. Nevertheless, the vibration behaviour of hybrid composite laminates due to the hybridisation has still not been fully understood. This study aims to analyse and optimise the natural frequency response of hybrid composite laminates under free vibration due to the effect of various lamination schemes, plate thicknesses and hybridisation volume fractions. Initial stage involved mesh convergence analysis and numerical validation. Design of Experiments approach was employed to set up the important parameters and effective case studies. The natural frequencies for each case study were determined and analysed using finite element analysis software. The final stage involved optimisation using Response Surface Method. The results from the 34 case studies showed that the range of natural frequency was between 116.53Hz and 5598.4Hz. It was found that both symmetric and anti-symmetric laminates with 0° fibre angle produced the highest natural frequency of 5598.4Hz. Considering other parameters, the thicker plate and higher volume of carbon produced higher natural frequency. In conclusion, this study has contributed significant knowledge such as better understanding the effect of the studied parameters on the natural frequencies of hybrid composite laminates.

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“…Curve diffusers with an angle of turn (30 o , 90 o , 120 o , 150 o , 180 o ), area ratio (1.60, 2.16, 4.00) and inflow Reynolds number (5.934x10 4 , 8.163x10 4 , 1.783x10 5 ) are considered. These ranges of variables are opted to serve common operating settings of curve diffuser for subsonic applications such as wind tunnel and HVAC systems [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Angle of Turn on Loss Characteristics and Flow Rectification of Curve Diffuser

Yong

Nordin

Rasidi

et al. 2022

CFDL

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Curve diffuser is often used in HVAC and wind tunnel systems to provide pressure recovery and avoid excessive energy loss to the surrounding environment. Performance of curve diffuser is disturbed mainly by the presences of flow separation and secondary flow vortices occurred due to the effect of turning angle, in which scarce literature found. In this study, the effect of turning angle from 30° to 180° configured with an area ratio of 1.60 to 4.00 and inflow Reynolds number of 5.934x104 – 1.783x105 on loss characteristics and flow rectification of curve diffuser is investigated with optimum configuration is proposed. Performance of curve diffuser is evaluated in terms of pressure recovery and flow uniformity using ANSYS CFD equipped with validated Standard k-ɛ model (ske) and enhanced wall treatment of y+ = 1.2 - 1.7. Results show that performance of pressure recovery and flow uniformity decreases respectively by 85.71% and 45.84% as the angle of turn increases from 30° to 180°. Curve diffuser with minimum angle of turn 30o, optimum area ratio 2.16 and intermediate Rein 8.163x104 turns out to be the best configuration to provide pressure recovery of 0.399 and flow uniformity of 3.630 m/s.

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Compressor Piping Design Effect on Vibration Data

Cited by 3 publications

References 24 publications

Stress Classification Lines for Non-Standard Y-Tee Design in Piping System

Stress Classification Lines for Non-Standard Y-Tee Design in Piping System

Natural Frequencies Optimisation of Hybrid Composite Laminates using Response Surface Method

Effect of Angle of Turn on Loss Characteristics and Flow Rectification of Curve Diffuser

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