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| Numerical Simulation of Fiber Slurry Flow Field inside the Vertical Hydraulic Pulper and Research on New Type of Its Tank Structure(Ι) |
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| DOI：10.11981/j.issn.1000-6842.2016.02.34 |
| Key Words:O-shaped vertical hydraulic pulper； D-shaped vertical hydraulic pulper； Fluent； numerical simulation； distribution of fiber slurry flow |
| Fund Project:南京林业大学江苏省制浆造纸科学与技术重点实验室开放基金（201409）；江苏高校优势学科建设工程资助项目(PAPD)。 |
| Author Name | Affiliation | | 窦 靖 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 | | 张 放 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 | | 沙九龙 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 | | 张 辉* | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 |
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| Abstract: |
| According to the assessment principles for pulpers including high efficiency, low energy consumption and running balance, based on the analysis of the structures of patented and applied vertical hydraulic pulpers domestically and abroad, using Fluent software to simulate the flow field of flow slurry at 5% consistency inside the O-shaped and D-shaped tanks, the distribution of pressure, velocity and turbulence intensity of both flow fields were obtained and analyzed. The results showed that the flow fields inside the O-shaped and D-shaped were vortex-like including a facade circulation and a horizontal swirling；the flow field inside the O-shaped was symmetrical and balanced, but the high-turbulence intensity area was limited to the rotor spinning region, and the turbulence intensity of the upper part was 1159% lower than that of the bottom part, the tangential velocity at the edge of the top of the flow field was zero and it was short of impact power；the flow field inside the D-shaped was with obviously increased turbulence intensity, and at the center of the D-shaped tank, the radius of low-turbulence intensity area was only 13.0% of the O-shaped tank； however, energy consumption inside the D-shaped tank was 22.7% higher caused by radially hitting the wall, and the D-shaped tank was with unbalanced running because of its unsymmetrical flow field. |
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