Design of a Guide Vane for Improving Inside Flow Uniformity of Electrostatic Precipitator

2013 ◽  
Vol 62 (4) ◽  
pp. 523-528
Author(s):  
Kyung-Wook Noh ◽  
Seong-Jun Bae ◽  
Sookhee Park ◽  
Sunkyun Kang ◽  
Jangmyung Lee
Keyword(s):  
Electrostatic Precipitator ◽  
Guide Vane ◽  
Flow Uniformity

scholarly journals A CFD-Based Shape Design Optimization Process of Fixed Flow Passages in a Francis Hydro Turbine

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1392
Author(s):  
Ujjwal Shrestha ◽  
Young-Do Choi
Keyword(s):  
Design Optimization ◽  
Draft Tube ◽  
Guide Vane ◽  
Optimization Techniques ◽  
Optimization Process ◽  
Shape Design ◽  
Flow Uniformity ◽  
Hydro Turbine ◽  
Shape Design Optimization ◽  
Hydro Turbines

In recent times, optimization began to be popular in the turbomachinery field. The development of computational fluid dynamics (CFD) analysis and optimization technology provides the opportunity to maximize the performance of hydro turbines. The optimization techniques are focused mainly on the rotating components (runner and guide vane) of the hydro turbines. Meanwhile, fixed flow passages (stay vane, casing, and draft tube) are essential parts for the proper flow uniformity in the hydro turbines. The suppression of flow instabilities in the fixed flow passages is an inevitable process to ensure the power plant safety by the reduction of vortex-induced vibration and pressure pulsation in the hydro turbines. In this study, a CFD-based shape design optimization process is proposed with response surface methodology (RSM) to improve the flow uniformity in the fixed flow passages of a Francis hydro turbine model. The internal flow behaviors were compared between the initial and optimal shapes of the stay vane, casing, and the draft tube with J-Groove. The optimal shape design process for the fixed flow passages proved its remarkable effects on the improvement of flow uniformity in the Francis hydro turbine.

Optimal Design of Reaction Hydro Turbine Model Stay Vane by Vane Angle and Thickness Distribution

2019 ◽  
Author(s):  
Ujjwal Shrestha ◽  
Jungwan Park ◽  
Young-Do Choi
Keyword(s):  
Flow Field ◽  
Guide Vane ◽  
Thickness Distribution ◽  
Leading Edge ◽  
Optimization Techniques ◽  
Design Parameters ◽  
Angle Distribution ◽  
Flow Uniformity ◽  
Pump Turbine ◽  
Vane Angle

Abstract Optimization is uprising technology in the engineering field, which enhance the performance of mechanical components. Likewise, upcoming turbomachinery designs need to be more efficient, cost-effective and easy manufacturing. Many optimization techniques have implemented for the development of efficient turbomachines. In this study, the optimization has mostly confined to the stay vane of reaction turbine like Francis, Pump Turbine etc. Stay vanes are mainly used to direct the flow towards guide vane and runner in the reaction type turbine (Francis, Pump Turbine). The three-dimensional flow field from the spiral casing is highly distorted, which causes secondary flow. However, the uniform flow field has maintained by stay vane. Due to steady flow field from stay vane, the performance of the runner has improved. Therefore, the better design of stay vane has been required for the improvement of the flow field around the runner passage. The design parameters of the stay vane are vane angle distribution and thickness distribution from leading edge to trailing edge. The vane angle distribution controls the stability of flow field direction and momentum towards the runner. Similarly, the thickness distribution will maintain the profile of the stay vane. The optimization of stay vane has improved turbine efficiency, flow uniformity, and pressure loss. The multi-objective genetic algorithm (MOGA) was selected for the optimization of stay vane because it satisfies all the objective functions without being dominated by any specific solution. MOGA is a more realistic approach to optimization. The validation test of performance is conducted to compare the result of experimental and numerical methods. The optimized stay vane has improved the flow uniformity around the stay vane.

Design, Analysis, and Development of a Wave-Current Laboratory

2020 ◽  
Author(s):  
Nhu Nguyen ◽  
Jacob Davis ◽  
Ahmed Alshuwaykh ◽  
Krish Thiagarajan Sharman
Keyword(s):  
Guide Vane ◽  
Offshore Structures ◽  
Maximum Height ◽  
Flow Uniformity ◽  
Marine Energy ◽  
Final Design ◽  
S Period ◽  
University Of Massachusetts ◽  
Current Loading ◽  
Flow Nonuniformity

Abstract In real ocean environments, offshore structures are exposed to a combination of wave and current loading conditions. This scenario presents the need to study fluid-structure interactions in the presence of both conditions, achievable through experimentation in a recirculating flume coupled with a wavemaker. The Ocean Resources and Renewable Energy (ORRE) group set out to design a recirculating wave-current flume at the University of Massachusetts Amherst to enable the study of technologies such as scale floating platforms and marine energy converters. In this paper, we present the methods used to arrive at an optimal flume design under strict spatial constraints posed by the available lab space. Limitations on the length, width, and height of flume are overcome via innovative flow designs and compact structures. The final design is approximately 11.5 m (37.7 ft) in length and 1.2 m (3.9 ft) wide with a nominal water depth of 1 m (3.3 ft). The 2 m long test section begins 6 m beyond the inlet of the flume to maximize flow uniformity. A 24” thruster driven by 75 hp electric motor maintains a current velocity of 0.5 m/s throughout the section while a wedge-shape plunger is implemented at the inlet to generate 0.6–2.8 s period waves with a maximum height of 0.2 m. During the design process, 2D computational fluid dynamics (CFD) simulations are employed to maximize flow uniformity over a range of inlet angles and guide vane configurations. In the optimal scenario, a flow nonuniformity of 8.7 % was obtained across a 0.7 m water column measured from the free surface. Results from the 3D simulation around the tight corner section showed significant increase in flow nonuniformity. The implementation of the screens along the flow path might be necessary in the future.

Numerical optimization of a Francis turbine’s guide vane axis location including inflow uncertainties

2013 ◽  
pp. 36-41
Author(s):  
Olivier Brugière ◽  
Guillaume Balarac ◽  
Christophe Corre ◽  
Olivier Métais ◽  
Emmanuel Flores ◽  
...  
Keyword(s):  
Numerical Optimization ◽  
Guide Vane

102. Filtration Characteristics of a Miniature Dual Saw-Like Electrodes Electrostatic Precipitator

2000 ◽  
Author(s):  
S. Huang ◽  
C. Chen ◽  
J. Huang ◽  
W. Lin ◽  
T. Shih
Keyword(s):  
Electrostatic Precipitator

Control of odor using an electrostatic precipitator andadsorption hybrid system in unregulated facilities

2014 ◽  
Vol 13 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Hak-Song Jeon ◽  
◽  
Jong-Min Kim ◽  
Kwang-Han Bae ◽  
Tae-Oh Kim
Keyword(s):  
Hybrid System ◽  
Electrostatic Precipitator

Effect of Trapezoid Wave Voltage on Preventing Particle Re-entrainment Phenomena in Electrostatic Precipitator

2009 ◽  
Vol 129 (7) ◽  
pp. 483-489 ◽  
Author(s):  
Koji Yasumoto ◽  
Akinori Zukeran ◽  
Yasuhiro Takagi ◽  
Yoshiyasu Ehara ◽  
Toshiaki yamamoto
Keyword(s):  
Electrostatic Precipitator

Performa cyclone dan electrostatic precipitator sebagai penangkap debu pada pabrik semen

2020 ◽  
Vol 26 (1) ◽  
pp. 22-26
Author(s):  
Nur H. T. Molek ◽  
Saputri A. Renelda ◽  
S. Syaiful
Keyword(s):  
Electrostatic Precipitator

Pencemaran udara dapat dikategorikan sebagai pencemaran yang sangat berbahaya dan juga memberikan dampak yang cukup besar bagi lingkungan disekitarnya. Cyclone dan electrostatic precipitator (EP) adalah contoh alat yang dapat mengurangi pencemaran udara di industri semen. Studi ini bertujuan untuk mengevaluasi kinerja cyclone dan EP. Perhitungan kinerja cyclone ditinjau dari jumlah putaran dalam gas dan diameter partikel, dan kinerja EP ditinjau dari kecepatan migrasi partikel dan resistivitas. Metode yang digunakan dalam penelitian ini adalah perhitungan evaluasi dengan menggunakan data aktual. Data tersebut berupa laju alir, densitas, diameter partikel, kecepatan gas inlet, data desain EP dan Cyclone, serta emisi partikulat dan kondisi alat pada saat operasi. Hasil evaluasi menunjukkan effisiensi cyclone sebesar 95,5% dan EP sebesar 98,72%. Kedua nilai efisiensi ini masih memenuhi standar efisiensi alat, yang berarti kinerja cyclone dan EP tersebut masih baik.

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