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1994 Fiscal Year Final Research Report Summary

Studies on building layout for effective cross-ventilation

Research Project

Project/Area Number 05452262
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Architectural environment/equipment
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

KATAYAMA Tadahisa  Kyushu University, Interdisciplinery Graduate School of Engineering Sciences, Professor, 大学院・総合理工学研究科, 教授 (80017938)

Co-Investigator(Kenkyū-buntansha) TSUTSUMI Junichiro  University of Ryukyus, Faculty of Engineering, Associate Professor, 工学部, 助教授 (60192647)
HAYASHI Tetsuo  Kyushu University, Interdiscipliney Graduate School of Engineering Sciences, Ass, 大学院・総合理工学研究科, 助教授 (40150502)
Project Period (FY) 1993 – 1994
KeywordsCross-Ventilation / Building Layout / Turbulent Numerical Simulation / Wind Tunnel Model Test / Air-flow arround Building / Wind Pressure Coefficient / Total Pressure Loss / High-rise Building
Research Abstract

Several cases of numerical simulation and wind tunnel tests of turbulent air flows in and around buildings were carried out for better utilization of cross-ventilation.k-e 2-equation model is adopted as a mathematical model of turbulence. The main results are summarized as follows : (1) The result of numerical simulation of an air flow around a high-rise building indicates good agreement with the distribution of wind velocity vectors in the whole simulation area measured by a tandem-type hot wire anemometer in a wind tunnel test. (2) The wind pressure coefficients on the walls facing to a narrow space between two houses are larger than those on a side wall of a single house. When the inter house gap is narrower, the change of the wind pressure in the wall is greater. (3) The absolute values of wind pressure coefficients on all the walls of regularly aligned low-rise houses are smaller and close to 0, when the building coverage ratio is larger in all the cases of wind direction. (4) The … More influence of a high-rise building model on the wind pressure on the walls of low-rise house models which are aligned regularly with a building coverage ratio of 25% around the building model becomes greater, when the building model is higher. (5) The wind pressure coefficients of low-rise house models located in the windward side of a high-rise building model are larger and those in the leeward side are smaller, when the building model is higher. (6) Numerical simulation methods employing partial refine technique are attempted successfully for the better analysis of cross-ventilation which is a continuous air flow phenomenon from the outside to the inside of a model building. (7) The estimate of a cross-ventilation rate needs total pressure drop coefficients at all the openings of a model building, because the air flow by cross-ventilation passing through the indoor space conserves its kinematic energy. The ventilation rates calculated by the conventional method based on static pressure differences and discharge coefficients of openings are smaller than actual cross-ventilation rates by 19-38%. (8) The total pressure drop coefficients at the inlet opening and that at the outlet opening of a model building are smaller than 1.0, and the latter is about a half of the former. The total pressure drop coefficients at the openings of partitions change greatly by the position of the partitions of the same shape. Especially, it is large when the partition is located to be a barrier of cross-ventilation. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] J.Tsutsumi: "Numerical Simulation of Cross Ventilation in a Single-Unit House" Proceedings of Room Air Convection and Ventilation Effectiveness. 447-451 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 何 平: "局所細分割メッシュ法による通風時の室内気流分布に関する数値シミュレーション" 日本建築学会計画系論文報告集. 第456号. 17-25 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 何 平: "数値シミュレーションによる通風量の検討" 九州大学大学院総合理工学研究科報告. 16巻1号. 23-32 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 片山忠久: "地域熱環境の研究(4)-“天然の冷房"-海風" ビル空調研究会 HACTEC. No.4. 23-31 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 何 平: "建物模型周辺気流に関する3種類の風速計による風洞実験と数値シミュレーションの比較" 第13回風工学シンポジウム論文集. 567-572 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 堤純一郎: "戸建住宅の隣棟空間を挟む壁面上の風圧に関する風洞模型実験" 第13回風工学シンポジウム論文集. 143-148 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.TSUTSUMI: "Numerical Simulation of Cross Ventilation in a Single-unit House" Proceedings of Room Air Convection and Ventilation Effectiveness. 447-415 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ping HE: "Local Fine Area Method for the Numerical Simulation of Cross-Ventilation" J.of Archit.Plann.Environ.Engng, AIJ. No.456. 17-25 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ping HE: "Study on Ventilation Rate by Numerical Simulation" Engineering Sciences Reports, Kyushu Unversity. Vol.16, No.1. 23-32 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.KATAYAMA: "Studies of Urban Thermal Environment No.4, Sea Breeze as Natural Cooling Resonrce" Heating・Air Conditioning・Cooling Technology. No.4. 23-31 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ping HE: "Comparisons between Wind Tunnel Model Tests by Three Kinds of Anemometer and Numerical Simulation on the Air Flow around a Building" Proceedings of 13th National Symposium on Wind Engineering. 567-572 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.TSUTSUMI: "Wind Tunnel Tests on the Wind Pressure on the Walls Face to the Space between Two Detached Houses" Proceedings of 13th National Symposium on Wind Engineering. 143-148 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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