Water Resources Management, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 29, 2024
Language: Английский
Engineering Applications of Computational Fluid Mechanics, Journal Year: 2025, Volume and Issue: 19(1)
Published: March 10, 2025
Language: Английский
Citations
1
Applied Sciences, Journal Year: 2025, Volume and Issue: 15(7), P. 3521 - 3521
Published: March 24, 2025
Large curvature, high pre-swirl large high-speed centrifugal fans are the preferred choice for industrial gas quenching furnaces, as they need to operate under non-uniform inlet conditions extended periods. The resulting distortion disrupts symmetric flow of gas, leading reduced fan stability and phenomena such separation rotational stall. This issue has become a key research focus in field applications. paper introduces an eddy viscosity correction method, compares it with experimental results from U-shaped pipe curved flow. corrected SST k-ω model shows maximum error only 4.7%. Simulation show that generates positive inflow relative intensity 3.83°. characteristics within impeller passage significantly affected by swirl angle distribution. At angle, leakage at blade tip develops into stall vortex spans entire passage, average blockage coefficient 0.29. minimum downstream is suppressed on suction side main flow, structure 0.21. To address design challenges distortion, method based secondary suppression proposed. Eleven surfaces selected control parameters, profile redesigned. Numerical simulations furnace’s temperature fields indicate modified reduces strength, decreasing 0.07 0.04, respectively. standard deviation velocity test section 42.78% compared original, fluctuation workpiece surface 53.09%. Both uniformity improved.
Language: Английский
Citations
0
Energy, Journal Year: 2025, Volume and Issue: unknown, P. 135511 - 135511
Published: March 1, 2025
Language: Английский
Citations
0
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(3)
Published: March 1, 2025
When subjected to a high-flow gas impact, the impeller and guide vane are prone vibration, jeopardizing equipment safety stability. This study presents collaborative optimization strategy for reducing flow-induced vibration of turbo-expander's vane. Parametric modeling profiles is conducted, followed by dimensionality reduction parameters based on geometric characteristics. Flow-induced arises from complex interactions between vane, where adjustments one component inevitably influence other due intricate coupling. Traditional heuristic algorithms, constrained numerous interacting design parameters, typically optimize individual structures rather than addressing overall system performance. To overcome this limitation, paper integrates tent chaotic mapping into conventional particle swarm algorithm, leveraging it initialize search space. approach broadens scope both components, enhances global coverage, improves system-wide Moreover, through extensive comparisons within optimization, introduction an adaptive t-distribution effectively balances exploration uncharted domains with exploitation known information, enabling more robust solutions coupled problems. The proposed framework allows direct parameter model updates, minimizing errors associated surrogate models significantly improving accuracy. Results demonstrate that method successfully avoids premature convergence while maintaining efficient execution Notably, pressure pulsation amplitudes in runners turbo expander were reduced 50.5% 37.3%, respectively, radial acceleration amplitude decreased 74.3%.
Language: Английский
Citations
0
Energy, Journal Year: 2025, Volume and Issue: unknown, P. 136046 - 136046
Published: April 1, 2025
Language: Английский
Citations
0
Energy, Journal Year: 2025, Volume and Issue: unknown, P. 136207 - 136207
Published: April 1, 2025
Language: Английский
Citations
0
Water, Journal Year: 2024, Volume and Issue: 16(21), P. 3100 - 3100
Published: Oct. 29, 2024
The process pump as turbine (PPAT) serves a crucial component for recovering high-pressure energy from mediums used in chemical and refining processes. Ensuring the long-term safe stable operation of PPAT high-temperature environments is essential, with pressure pulsation being one its most significant external characteristic indicators. This study investigates evolution vortex structure distribution generation propagation mechanisms two-stage operating mode. Results indicate that uniformity coefficient (Cp) gradient poorer first stage runner compared to second stage, larger area high-strength vortices. In draft tube, strength increases rising flow rates, around circular cylinder on side gradually develops both sides. diffusers, primary source dynamic static interference effect between two impellers corresponding diffuser tongue. interstage frequency n*15fn pronounced inflow runner, weakening along direction, ultimately disappearing tube. addition, more low-frequency signals 0.5fn are captured tube under large conditions, which mainly generated by band high attenuation slow, has great destructive recovery system PPAT.
Language: Английский
Citations
0
Water Resources Management, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 29, 2024
Language: Английский
Citations
0