Publications
| # | Published Date | Details |
|---|---|---|
| 161. | 28-02-2022 | Experimental analysis for Leakage Flow in a Newly Designed finger Seal with Axial Wedge
Rajesh P 1, J Sharana Basavaraja 2, V Arun Kumar3
1 Assistant Professor, B.M.S College of Engineering, Bangalore – 560019(INDIA)
2 Professor, B.M.S College of Engineering, Bangalore – 560019(INDIA)
3 Consultant, R&D, B.M.S College of Engineering, Bangalore – 560019(INDIA)
Keywords: Finger seal, Axial wedge, Leakage analysis, Mass flow rate
ABSTRACT
Power losses in secondary cycle of jet engine are result of secondary seal leakage. Overall performance of turbine increases if the leakage reduces, hence sealing plays a major role in gas turbine. A lot of work is being done on optimizing leakage by making changes in the seal design and reduce the wear between the rotor and the seal. The main objective of this work is to create a pressure wedge in direction opposite to the leakage flow and control the flow. To achieve this a tapper is introduced in the pad and a pressure wedge is created which helps in hydrodynamic lifting of the finger and also reduce leakage. An experimental study of leakage for the seal with wedge and without wedge is performed and the results are compared. The experimental study showed that there was a reduction of leakage by nearly 15% at higher pressure in comparison to conventional seal.
1 INTRODUCTION
In a gas turbine the major role is played by seals in term of improving performance, reliability and work life of engines. Commonly used seals in turbo machinery applications are labyrinth seals, Labyrinth are simple to manufacture and assemble, they are reliable with good sealing and tolerance to large thermal and pressure variations. Labyrinth seals works on the principle that fluid pressure energy been converted at each tooth tip clearance into kinetic energy that is dissipated into heat by turbulence and enters the subsequent tooth clearance by kinetic energy carry over. With all this advantage it possesses a problem in terms of wear so it cannot maintain very tight radial clearance [1&2]. This gives a scope for noncontact type of seal which reduces the clearance between the shaft and the seal and also increases the life of the seal because of its complaints feature. This Compliant features allow this type of seal to accommodate shaft dynamic motion while maintaining seal clearance. This results in little to no wear and long life capability and also good sealing capability. The complaint feature can be obtained by finger seal and brush seal but the brush seal gets stiffened at such high pressure and temperature making finger seal as the area of research.
2 Methodology
2.1 Seal for Experimental Testing
Annealed spring steal is used to manufacture the developed finger seal. Seals with the outer diameter of 110mm, inner diameter of 80mm and thickness of 4 mm with Finger sticks created on the circumference of the inner diameter of the seal was fabricated using Wire EDM. Figure 1 shows the fabricated finger seal.
Figure 1: Finger Seal without axial wedge
3 Results and Discussion
3.1 Leakage Analysis of Three Row Finger Seal
Both the finger seal with axial pressure wedge, i.e. wedge against the direction of leakage flow and along the leakage flow, was subjected to a leakage test using the test rig for different Inlet pressure of 4, 6, 8 and 10 bar. Experimental results showed a variation of nearly 13 to 30 percent in leakage with the increase in pressure. The seal with a pressure wedge against the flow showed reduced leakage in comparison with seal with pressure wedge along the direction of the leakage. Graph showing the comparison between conventional finger seal, Increasing and decreasing pressure wedge is as shown in figure 2.
Figure 2: Experimental leakage flow comparison with conventional finger seal
4 Conclusion
Experiment for leakage was conducted at 10,000 Rpm at different Inlet pressures and leakage was measured using a flow meter. Pressure wedge created by the introduction of tapper in the pad created a resistance to leakage through clearance. Results showed Introduction of wedge reduced leakage by 19% in comparison with the conventional finger seal.
References
[1] Delgado, Irebert R., and Margaret P. Proctor."Continued investigation of leakage and power loss test results for competing turbine engine seals." AIAA Paper 2006-4754, 2006.
[2] Delgado, Irebert R., and Margaret P. Proctor."leakage and power loss test results for competing turbine engine seals." AIAA Paper 2006-4754, 2006.
[3] Chen Guoding, Wang Li’na, Yu Qiangpeng and Su Hua.“Dynamic analysis of C/C composite finger seal." Chinese Journal of Aeronautics 2014,27(3):745-748.
[4] Hazel, M. "A study of non-contacting passive-adaptive turbine finger seal performance." Ph.D. Thesis, 2007, The University of Akron, 2007.
[5] Proctor, Margaret P, and Irebert R. Delgado. "Preliminary test results of a non-contacting finger seal on a herringbone-grooved rotor." NASA Technical Memorandum NASA/TM-2008-215475, 2008.
Acknowledgements
The author is extremely grateful to the organization B.M.S. College of engineering, Bangalore and TEQIP-III for awarding financial assistantship towards meeting the conference expenses. Also thanks to all the members of the organizers’ of the conference MITC2020ne for accepting my paper and allowing me to present at the conference.
Authors: Rajesh P,J Sharana Basavaraja Link |
| 162. | 14-02-2022 | OPTIMIZATION OF WEAR BEHAVIOUR OF Al7075/SiC/Al2O3 MMCS USING STATISTICAL METHOD, Advances in Materials and Processing Technologies, 8 (4), pp. 4018-4035. Authors: M RAVIKUMAR, HN REDDAPPA, R SURESH, ER BABU, NAGARAJA C REDDY Link |
| 163. | 31-01-2022 | " STUDY ON THE TRIBOLOGICAL PROPERTIES OF A356/AL2O3 AND PARAMETRIC OPTIMIZATION OF WEAR BEHAVIOUR USING TAGUCHI AND RSM" International Journal of Innovative Research in Advanced Engineering (IJIRAE), Volume 09, Issue 01 January 2022 Mendeley (Elsevier Indexed) Citefactor 3.19 (2019) IMPACT FACTOR VALUE: |INNOSPACE: 7.301 (2019) | PIF: 6.469 | JOUR INFO:7.345 | | ISRAJIF: 7.342(2019) | INDEX COPERNICUS 2019 = 194.51 Authors: Kirankumar N,Dr. B N Sarada.Dr. P L Srinivasamurthy.Dr. Mallaradhya H M Link |
| 164. | 06-12-2021 | Title: Analysis and Optimization of Dimensional Accuracy and Porosity of High Impact Polystyrene Material Printed by FDM Process: PSO, JAYA, Rao, and Bald Eagle Search Algorithms. Journal: Materials. Volume: 14. Issue: 23. Pages: 7479.1-7479.20. Publisher: MDPI. Authors: Manjunath Patel Gowdru Chandrashekarappa, Ganesh Ravi Chate, Vineeth Parashivamurthy, Balakrishnamurthy Sachin Kumar, Mohd Amaan Najeeb Bandukwala,Annan Kaisar, Khaled Giasin, Danil Yurievich Pimenov and Szymon Wojciechowski Link |
| 165. | 03-12-2021 | Investigating The Lubricated Sliding Wear Behaviour of
Aluminium Matrix Composite Produced by Stir – Squeeze Cast
Process
Nat.Volatiles&Essent.Oils,2021;8(5):6861-6877 Authors: Bharathi.V , Prabhu Swamy N R , B R Ramji , M. Ramachandra , S. Srinivas |
| 166. | 01-12-2021 | The Tribological investigation of A356/ Aluminium oxide Metal Matrix Composite by Taguchi’s Techniques; International Journal of Mechanical Engineering Authors: Kiran Kumar N a*, B N Sarada b, P L Srinivasa Murthy c, Chethana K Y d Link |
| 167. | 30-11-2021 | INVESTIGATING THE LUBRICATED SLIDING WEAR BEHAVIOUR OF ALUMINIUM MATRIX COMPOSITE PRODUCED BY STIR – SQUEEZE CAST PROCESS” Nat.Volatiles&Essent.Oils,2021;8(5):6861-6877, e-ISSN: 2148-9637, Impact Score: 0.65 (Q3) Authors: Bharathi.V, Prabhu Swamy N R, B R Ramji, M. Ramachandra, S. Srinivas, |
| 168. | 01-10-2021 | STUDY ON MICRO-NANO SIZED Al2O3 PARTICLES ON MECHANICAL, WEAR AND FRACTURE BEHAVIOR OF Al7075 METAL MATRIX COMPOSITES, Frattura ed Integrita Strutturale, 15 (58), pp. 166-178. Authors: M RAVIKUMAR, HN REDDAPPA, R SURESH, ER BABU, NAGARAJA C REDDY Link |
| 169. | 30-09-2021 | "Conjugate Heat Transfer Analysis of Flat Plate Subjected to Impingement and Film Cooling", International Journal for Research in Applied Science and Engineering Technology, Volume 9 Issue IX Sep 2021, pg 1667-1678. Authors: Devaraj K, Ganesh N Link |
| 170. | 28-09-2021 | “Fracture mechanics comparison studies on an edge cracked specimen and compact tension specimen using ABAQUS” International Journal of Advanced Research in Basic Engineering Sciences and Technology (IJARBEST), Vol.7, Issue.9, September 2021 Pages 1-8,ISSN (ONLINE):2456-5717 Authors: Vishwas B Patil,H. K. Rangavittal and Kiran Sundara Rajan |
| 171. | 10-09-2021 | Influence of process parameters on tool wear and temperature of coated HSS tools on drilling of hardened EN8 alloy steel, Materials Today (Proceedings), 50(5),1713-1720.
ISSN: 2214-7853 Authors: D. Roopa, Vardhaman S. Mudakappanavar, R. Suresh, Tataram K. Chavan Link |
| 172. | 28-08-2021 | Effect of Nonlinear Edge Loads and Hybridization of FMLs on Buckling and Vibration Performance of Interlaminar composites with/without Cutouts. Authors: Yathish Muddappa; T, Rajanna; G, Giridhara Link |
| 173. | 25-08-2021 | Studies on modal analysis of aluminium based carbon fibre reinforced optimized alloy wheel used in automotive sectors, Materials Today: Proceedings, 2021, ISSN 2214-7853, https://doi.org/10.1016/j.matpr.2021.08.099. Authors: Ananthakrishna Somayaji, Narasimha Marakala, Shashiraj Somayaji, Ajit M. Hebbale Link |
| 174. | 17-08-2021 | Title: Magnetic Behavior of Polymorph Composite Nickel Titanate Nanofibers. Journal: New Journal of Chemistry. Volume: 45. Issue: 37. Pages: 17438-17446. Publisher: Royal Society of Chemistry. Authors: B. Sachin Kumar, C. Dhanasekhar, S. Anandhan, Sreeram K. Kalpathy Link |
| 175. | 03-08-2021 | Effect of carbon nanotubes on microhardness and adhesion strength of high-velocity oxy-fuel sprayed NiCr–Cr3C2 coatings Authors: Manjunatha Kuruba , Giridhara Gaikwad, Jegadeeswaran Natarajan, Praveennath G Koppad Link |
| 176. | 01-08-2021 | Study On Stress Relaxation Behavior of Cantilever Beam Using Abaqus And Validation Through Analytical Calculation, Journal of Emerging Technologies and Innovative Research, August 2021, Volume 8, Issue 8 Authors: Anusha J, Dr. J Sharana Basavaraja, Vivek Govindan Link |
| 177. | 19-07-2021 | Effect of Nonlinear Edge Loads and Reinforced cutouts on the Buckling and Vibration Performance of Hybrid fibre metal laminates. Authors: Yathish Muddappa; T, Rajanna; G, Giridhara Link |
| 178. | 08-07-2021 | Characterization of TIG and MIG welded Aluminium 6063 alloys
Materials Today: Proceedings 46 (2021) 8895–8899
Authors: B.R. Ramji , V. Bharathi , N.R. Prabhu Swamy Link |
| 179. | 05-07-2021 | Effect of compression and tension types of concentrated edge loads on buckling and vibration behavior of interlaminar hybrid fibre metal laminates Authors: Yathish Muddappa; T, Rajanna; G, Giridhara Link |
| 180. | 01-07-2021 | The Mechanical Properties and Microstructure Behavior of Aluminium Alloys Subjected to Shock Waves, Authors: Ravikumar R N ,Rajesh G H |