Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors
Hydraulic turbines contribute to 60% of renewable energy in the world; however, they also entail some adverse effects on the aquatic ecology system. One such effect is their excessive noise and vibration. To minimize this effect, one of the most effective and feasible solutions is to modify the desi...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/169727 |
| _version_ | 1811676996164386816 |
|---|---|
| author | Pitsikoulis, Stylianos Argyrios Tekumalla, Sravya Sharma, Anurag Wong, Eugene Wai Leong Turkmen, Serkan Liu, Pengfei |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Pitsikoulis, Stylianos Argyrios Tekumalla, Sravya Sharma, Anurag Wong, Eugene Wai Leong Turkmen, Serkan Liu, Pengfei |
| author_sort | Pitsikoulis, Stylianos Argyrios |
| collection | NTU |
| description | Hydraulic turbines contribute to 60% of renewable energy in the world; however, they also entail some adverse effects on the aquatic ecology system. One such effect is their excessive noise and vibration. To minimize this effect, one of the most effective and feasible solutions is to modify the design of the turbine rotor blade by introducing a skew. In this study, two 0.3-meter tidal turbines with 0-degree (no-skewness) and positive 90-degree skewness made of stainless steel 316L were designed and printed using a 3-D printing powder bed fusion technique. These rotors were then tested at the Emerson Cavitation Tunnel (ECT) at Newcastle University, UK, and the variation in the skewness of the blades of the turbines as a function of the power coefficient on a given tip speed ratio (TSR) value was ascertained. Results showed that the highly skewed rotor had significantly lower drag and torque fluctuations, with a slight decrease in efficiency compared to the non-skewed one, which warrants further investigation on the effect of added skew to reduce vibration and noise. Numerical simulations were also performed for verification and validation of the experimental tests, using the H45 dynamometer at the ECT. A comprehensive software code for propellers and tidal turbines, ROTORYSICS, was used to examine the cavitation effect of the two rotors; a comparison was made for both, with and without cavitation. The results indicate that for a high immersion depth of tidal turbine rotors, cavitation rarely occurs, but for hydrokinetic turbines that are installed on dams in rivers and falls, cavitation could be a serious concern. It was concluded that the 0-degree skewed rotor is more hydrodynamically efficient than the 90-degree skewed rotor. |
| first_indexed | 2024-10-01T02:30:20Z |
| format | Journal Article |
| id | ntu-10356/169727 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:30:20Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1697272023-08-05T16:48:14Z Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors Pitsikoulis, Stylianos Argyrios Tekumalla, Sravya Sharma, Anurag Wong, Eugene Wai Leong Turkmen, Serkan Liu, Pengfei School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Tidal Turbines Cavitation Tunnel Hydraulic turbines contribute to 60% of renewable energy in the world; however, they also entail some adverse effects on the aquatic ecology system. One such effect is their excessive noise and vibration. To minimize this effect, one of the most effective and feasible solutions is to modify the design of the turbine rotor blade by introducing a skew. In this study, two 0.3-meter tidal turbines with 0-degree (no-skewness) and positive 90-degree skewness made of stainless steel 316L were designed and printed using a 3-D printing powder bed fusion technique. These rotors were then tested at the Emerson Cavitation Tunnel (ECT) at Newcastle University, UK, and the variation in the skewness of the blades of the turbines as a function of the power coefficient on a given tip speed ratio (TSR) value was ascertained. Results showed that the highly skewed rotor had significantly lower drag and torque fluctuations, with a slight decrease in efficiency compared to the non-skewed one, which warrants further investigation on the effect of added skew to reduce vibration and noise. Numerical simulations were also performed for verification and validation of the experimental tests, using the H45 dynamometer at the ECT. A comprehensive software code for propellers and tidal turbines, ROTORYSICS, was used to examine the cavitation effect of the two rotors; a comparison was made for both, with and without cavitation. The results indicate that for a high immersion depth of tidal turbine rotors, cavitation rarely occurs, but for hydrokinetic turbines that are installed on dams in rivers and falls, cavitation could be a serious concern. It was concluded that the 0-degree skewed rotor is more hydrodynamically efficient than the 90-degree skewed rotor. Ministry of National Development (MND) Published version NTU Presidential Postdoctoral Fellowship for S. Tekumalla and Newcastle University Start-up funding for P.L. 2023-08-01T05:50:54Z 2023-08-01T05:50:54Z 2023 Journal Article Pitsikoulis, S. A., Tekumalla, S., Sharma, A., Wong, E. W. L., Turkmen, S. & Liu, P. (2023). Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors. Energies, 16(9), 3675-. https://dx.doi.org/10.3390/en16093675 1996-1073 https://hdl.handle.net/10356/169727 10.3390/en16093675 2-s2.0-85159363199 9 16 3675 en Energies © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). application/pdf |
| spellingShingle | Engineering::Mechanical engineering Tidal Turbines Cavitation Tunnel Pitsikoulis, Stylianos Argyrios Tekumalla, Sravya Sharma, Anurag Wong, Eugene Wai Leong Turkmen, Serkan Liu, Pengfei Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors |
| title | Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors |
| title_full | Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors |
| title_fullStr | Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors |
| title_full_unstemmed | Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors |
| title_short | Cavitation hydrodynamic performance of 3-D printed highly skewed stainless steel tidal turbine rotors |
| title_sort | cavitation hydrodynamic performance of 3 d printed highly skewed stainless steel tidal turbine rotors |
| topic | Engineering::Mechanical engineering Tidal Turbines Cavitation Tunnel |
| url | https://hdl.handle.net/10356/169727 |
| work_keys_str_mv | AT pitsikoulisstylianosargyrios cavitationhydrodynamicperformanceof3dprintedhighlyskewedstainlesssteeltidalturbinerotors AT tekumallasravya cavitationhydrodynamicperformanceof3dprintedhighlyskewedstainlesssteeltidalturbinerotors AT sharmaanurag cavitationhydrodynamicperformanceof3dprintedhighlyskewedstainlesssteeltidalturbinerotors AT wongeugenewaileong cavitationhydrodynamicperformanceof3dprintedhighlyskewedstainlesssteeltidalturbinerotors AT turkmenserkan cavitationhydrodynamicperformanceof3dprintedhighlyskewedstainlesssteeltidalturbinerotors AT liupengfei cavitationhydrodynamicperformanceof3dprintedhighlyskewedstainlesssteeltidalturbinerotors |