Turbulence Modeling of Compressible Fluid Flow with Buoyancy

具有浮力的可压缩流体的湍流建模

• 批准号: 05044082
• 负责人: MURAKAMI Shuzo
• 金额: $ 4.48万
• 依托单位: INSTITUTE OF INDUSTRIAL SCIENCE,University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05044082/
• 关键词: Fire; Density fluctuation; Compressible; High buoyancy flow; Smoke movement; Numerical simulation; LDV; 数値解析

In order to design fire escapes, it is very important to predict smoke movement in a building on fire. In numerical simulation of low-speed turbulent flows, the assumption of incompressibility of fluid is usually used. However, in the case of fire, strong density variation due to high temperature occurs. In such a flowfield, that assumption cannot be made. Thus, a new turbulence model for smoke movement with variable density need to be developed. In the first year, precise measurement of turbulence statistics of natural air convection along a heated vertical plate was conducted using a Laser Doppler Velocimeter (LDV) and a fine thermocouple 12 mu m in diameter. And the same flowfield is numerically simulated and the results are compared with the above experiment. A good agreement with the experiment was found in the model which includes some effect of density fluctuation. In the last year, model experiment of a fire room was conducted by means of the measuring method developed in the first year. And same flowfield is numerically simulated and the accuracy of the turbulence model developed in the first year was confirmed.

火灾时建筑物内烟气运动的预测对于火灾逃生设计具有重要意义。在低速湍流流动的数值模拟中，通常采用流体不可压缩的假设。然而，在火灾的情况下，由于高温而发生强烈的密度变化。在这样的流场中，不能作这种假设。因此，需要发展一种新的变密度烟气湍流模型。在第一年，精确测量湍流统计的自然空气对流沿着加热垂直板进行使用激光多普勒测速仪（LDV）和一个罚款热电偶12 μ m直径。并对相同的流场进行了数值模拟，并与上述实验结果进行了比较。模型考虑了密度涨落的影响，与实验结果吻合较好。最后一年利用第一年发展的测量方法进行了火灾房间的模型实验。并对同一流场进行了数值模拟，验证了第一年建立的湍流模型的准确性。

项目成果

村上周三 加藤信介 義江龍一郎: "Experimental and Numerical Study on Natural Convection with Strong Density Variation along a Heated Vertical Plate" Ninth Symposium on Turbulent Shear Flows. 12-5-1-12-5-6 (1993)

Shuzo Murakami、Shinsuke Kato 和 Ryuichiro Yoshie：“沿加热垂直板的强密度变化的自然对流的实验和数值研究”第九届湍流剪切流研讨会（1993 年）。

S.Kato, S.Murakami & R.Yoshie: "Calculation of Free Convection along a Heated Vertical Flat Plate" Journal of Archi.Plann.Environ.Engig.AIJ. 449. 19-27 (1993)

加藤圣、村上圣

村上周三、加藤信介、義江龍一郎: "圧縮性高浮力流れの数値シミュレーションに関する研究(その1〜7)" 日本建築学会大会学術講演梗概集,関東支部研究報告集 空気調和・衛生工学会講演論文集. (1991-1992)

村上修三、加藤信介、吉江龙一郎：《可压缩高浮力流数值模拟研究（第1～7部分）》日本建筑学会会议学术讲座论文集、关东分会研究报告、学会论文集日本空调和卫生工程师 (1991-1992)

村上周三 加藤信介 小林光: "Current status of CFD application to air-conditioning engineering" アジア地域の建築・都市環境調和技術に関する環太平洋シンポジウム. (1995)

Shuzo Murakami、Shinsuke Kato、Hikaru Kobayashi：“CFD 在空调工程中的应用现状”亚洲环太平洋建筑与城市环境和谐技术研讨会（1995 年）。

村上周三 加藤信介 大岡龍三: "Comparison of Numerical Predictions of Horizontal Nonisothen mal Jet in a Room with Three Tcubulence Models-k-ε EVM,and DSM" ASHRAE TRANSACTIONS. 100 pt.2. (1994)

Shuzo Murakami、Shinsuke Kato、Ryuzo Ooka：“具有三个 Tcubulence 模型 -k-ε EVM 和 DSM 的房间内水平非等值射流数值预测的比较”ASHRAE TRANSACTIONS (1994)。