Research on the axial velocity change rule of desktop slot exhaust hood

• CHEN Jianwu

  China Academy of Safety Science and Technology, China Key Laboratory of Toxic and Dust Hazards Prevention and Control Technology, State Administration of Work Safety, China

抄録

The desktop slot exhaust hood has been widely used, but it is calculated by empirical formula. Axial velocity change rule of desktop slot exhaust hood can effectively provide the basis of the wind speed needed in order to control the poison. According to gas motion mathematical model, the geometry model and boundary conditions of desktop slot exhaust hood was established, and the influence of the hood sizes to axial velocity were analyzed by Fluent simulation. The changes of relationship between the axial velocity (V) and the distance from the hood mouth (L), the short edge of the hood mouth (a), the long edge of the hood mouth (b), the equivalent diameter of the hood mouth (d) and the square root of the hood mouth area (√A) were comparative analyzed by dimensionless processing. The result is the V/V₀ with L/d have better change rule. The axial velocity change rule of different axial velocity were also analyzed using V/V₀ with L/d change rule, and the change rule of V/V₀ with L/d of desktop slot exhaust hood was obtained, which was verified by experiment.

収録刊行物

• Ｉｎｄｕｓｔｒｉａｌ　ｈｅａｌｔｈ

  Ｉｎｄｕｓｔｒｉａｌ　ｈｅａｌｔｈ 56 (4), 278-284, 2018

  独立行政法人 労働者健康安全機構 労働安全衛生総合研究所

キーワード

• Slot
• Exhaust hood
• Axial velocity
• Ventilation
• Dimensionless
• Velocity change rule

詳細情報

• CRID: 1390845712978558336
• NII論文ID: 130007420174
• NII書誌ID: AA00672955
• DOI: 10.2486/indhealth.2017-0211
• ISSN: 18808026
• ISSN: 00198366
• NDL書誌ID: 029138361
• PubMed: 29459580
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029138361
• Web Site: https://www.jstage.jst.go.jp/article/indhealth/56/4/56_2017-0211/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • PubMed
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可