REINFORCED NOZZLE-CYLINDRICAL SHELL INTERSECTIONN UNDER INTERNAL PRESSURE AND NOZZLE RADIAL THERMAL EXPANSION

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1 International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 8, August 2017, pp , Article ID: IJMET_08_08_029 Available online at aeme.com/ijmet/issues.asp?jtype=ijmet&vtyp pe=8&itype=8 ISSN Print: and ISSN Online: IAEME Publication Scopus Indexed STRUCTURAL AND THERMAL ANALYSIS OF REINFORCED NOZZLE-CYLINDRICAL SHELL INTERSECTIONN UNDER INTERNAL PRESSURE AND NOZZLE RADIAL THERMAL EXPANSION K. Vijayaa Krishna Varma and V.S.V Sai Sumanth Department of Mechanical Engineering, Gitam University, Hyderabad, Telangana. ABSTRACT Pressure vessels are widely applied in many branches of industry such as chemical and petroleum machine-building, nuclear and power engineering, gas, oil and oilnecessary in the refining industries, aerospace techniques, etc. Nozzles or opening are pressure vessels to satisfy certain requirements such as inlet or outlet connection, manholes, vents & drains etc. Welded nozzles connecting a pressure vessel to piping can be placed both on the cylindrical shell and the heads of the vessel.in this thesis, the effect of material with respect to stress distribution and temperature distribution is analyzed using finite element analysis. Keywords: Nozzle, Steel, Aluminum, Copper, Thermal & Static analysis. Cite this Article: K. Vijaya Krishna Varma and V.S.V Sai Sumanth, Structural And Thermal Analysis Of Reinforced Nozzle-Cylindrical Shell Intersectionn Under Internal Pressure And Nozzle Radial Thermal Expansion, International Journal of Mechanical Engineering and Technology 8(8), 2017, pp MET/issues.asp?JType=IJMET&VType=8&ITy ype=8 1. INTRODUCTION Geometrical parameters of nozzle connections may significantly vary even in one pressure vessel. These nozzles cause geometric discontinuity of the vessel wall. So a stress concentration is created around the opening. The junction may fail due to these high stresses. Hence a detailed analysis is required. One of the parts of overall structural analysis for nozzle connections is the stress analysis of two intersecting shells. Due to different loadings applied to these structures, a local stress state of nozzle connection characterized by high stress concentration occurs in intersection region. Internal pressure is primary loading used in the structure analysis for determination of main vessel-nozzle connections. The codes suggest a procedure to design the junction, but do not provide any methodology to calculate the extended and magnitude of these high stresses. The available analytical solution WRC-107 is limited to simple geometries editor@iaeme.com

2 K. Vijaya Krishna Varma and V.S.V Sai Sumanth 2. PARAMETERS: A. Design Data: Design Code: ASME Section VIII Div. 2 Design Pressure: 0.23 MPa = Pa = 2.3 N/m 2 Reference Temperature: 220 C Material: structural steel B. Geometry: Vessel ID: 1150 mm S Hell Thickness: 75 mm Length of Vessel: 6200 mmm Pad ID: 280 mm Pad OD: 560 mm Pad Thickness: 72 mm Nozzle ID: 150 mm Nozzle Thickness: 65 mm Nozzle Height (total): mm Nozzle Head Dia: 400 mmm ;Nozzle Head Thickness: 45 mm 3. MODELING OF THE NOZZLE-CYLINDRICAL SHELLL MODELING PROCEDURE Figure 1 3D Drafting Figure 2 2D design 4. STATIC ANALYSIS MATERIAL STEEL Figure 3 Inlet Static model editor@iaeme.com

3 Structural and Thermal Analysis of Reinforced Nozzle-Cylindrical Shell Intersection Under Internal Pressure and Nozzle Radial Thermal Expansion Figure 4 Pressure Inlet Figure 5 Temperature inlet Figure 6 Strain Figure 7 Stress 5. MATERIAL ALUMINUM ALLOY Figure 8 Deformation editor@iaeme.com

4 K. Vijaya Krishna Varma and V.S.V Sai Sumanth Figure 9 Stress 6. MATERIAL COPPER Figure 10 Strain Figure 11 Deformation Figure 12 Strain Figure 13 Stress editor@iaeme.com

5 Structural and Thermal Analysis of Reinforced Nozzle-Cylindrical Shell Intersection Under Internal Pressure and Nozzle Radial Thermal Expansion 7. THERMAL ANALYSIS Figure 14 Temperature Inlet Figure 15 Convection Figure 16 Heat flux Figure 17 Convection 8. MATERIAL ALUMINUM ALLOY Figure 18 Heat flux

6 K. Vijaya Krishna Varma and V.S.V Sai Sumanth 9. MATERIAL COPPER Figure 19 Temperature Figure 20 Heat flux 10. RESULTS TABLE Figure 21 Thermal analysis Table 1 Static Analysis Steel Aluminum alloy Copper Steel Aluminum alloy copper Total deformation(mm) Strain e e e-5 Table 2 THERMAL ANALYSIS TEMPERATURE (K) Stress(MPa) HEAT FLUX (W/mm 2 ) CONCLUSION The Static and Thermal analysis is done the pressure vessel under internal pressures and thermal expansion to determine the stresses, deformations, temperature distribution respectively using different materials Steel, Aluminum alloy and Copper.By observing the editor@iaeme.com

7 Structural and Thermal Analysis of Reinforced Nozzle-Cylindrical Shell Intersection Under Internal Pressure and Nozzle Radial Thermal Expansion static analysis results, the deformation and strain values are less for Steel when compared with that of Aluminum alloy and Copper. By observing stress values, the obtained stress values are less than their respective yield stress values for all materials. The stress value is less for Copper when compared with that of Aluminum alloy and Steel. But the density of Aluminum alloy is less than that of Copper and Steel. So Aluminum alloy can be preferred. By observing the thermal analysis results, the heat flux is more for Copper when compared with that of Aluminum alloy and Steel. When the heat flux is more, heat transfer rate is more REFERENCES [1] Dekker, C.J. and Bos, H.J., Nozzles-on external loads and internal pressure, International Journal of pressure vessel and piping 72 (1997) I-18. [2] Kiran D. Parmar1, Kiran A. Patel2, Dinesh D Mevada3 Address for Correspondence 1, 3 M. E. Student, 2Asst. Prof., Mechanical Engineering Department L.D.R.P-institute of Technology and Research and Technology, Gandhinagar, India. [3] Fang, J., Tang, Q.H., and Sang Z.F., A comparative study of usefulness for pad reinforcement in cylindrical vessels under external load on nozzle, International journal of pressure vessels & piping 86 (2009) [4] AmranAyob, Stress analysis of torispherical shell with radial nozzle, Journal - The Institution of Engineers, Malaysia (Vol. 67, No. 3, September 2000 [5] Skopinsky, V.N. and Smetankin, A.B., Modelling and stress analysis of nozzle connections in ellipsoidal heads of pressure vessels under external loading,int. Journals of Applied Mechanics and Engineering, 2006, vol.11, No.4, pp [6] Rakesh Jaiswal, Anupam Raj Jha, Anush Karki, Debayan Das, Pawan Jaiswal, Saurav Rajgadia, Ankit Basnet and Rabindra Nath Barman. Structural and Thermal Analysis of Disc Brake Using Solidworks and Ansys, International Journal of Mechanical Engineering and Technology, 7(1), 2016, pp [7] Diyyala Naga Moulika, Reshma Vasireddy and P. Polu Raju, Modelling and Analysis of Reinforced Concrete Beam Under Flexure Using Ansys. International Journal of Civil Engineering and Technology, 8(3), 2017, pp editor@iaeme.com