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Universality in small scale structures in pressure fluctuation in turbulence

Research Project

Project/Area Number 13650175
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionNagoya University

Principal Investigator

TSUJI Yoshiyuki  Nagoya University, Energy Eng & Sci., Associate Prof., 大学院・工学研究科, 助教授 (00252255)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2001: ¥3,200,000 (Direct Cost: ¥3,200,000)
Keywordsturbulence / static pressure / universal law / small-scale structure / 速度・圧力変動
Research Abstract

In this study we report on the experimental result of pressure statistics measured in the free jet in the range of Reynolds number ; 200 【less than or equal】 R_λ 【less than or equal】 1200. And the traditional theories for the scaling properties of pressure statistics. Which are not yet confirmed in a number of important aspect, are checked. The measurement of pressure fluctuation in the flow field was accomplished with standard quarter-inch condenser microphone and the small transducer, respectively. They were fitted with a tubing as a pressure duct and were inserted into the flow domain in such a way that the axis of the microphone (or the transducer) body was aligned with the mean stream. The static tube is 1mm in diameter and 15mm in length which has four static holes (0.4mm in diameter) on the surface. The frequency response of the microphone with the necessary ancillary equipment is flat up to 15kHz. But the lower frequency can be measured down to 20Hz. This is not enough for high Reynolds number flow or the flow in which the large scale motions are contained. So we adopted the small transducer in the case of 300 【less than or equal】 R_λ. There seems to be no agreement about the scaling of pressure spectrum when compared to the case of energy spectrum. The present experiment shows that the clear -7/3 power-law was confirmed for 650 【less than or equal】 R_λ. This is significantly higher Reynolds number than those needed for inertial scaling in velocity statistics. Smaller than this Reynolds number, but R_λ 【greater than or equal】 350, the spectral exponent departs from -7/3. The coefficient C_p is not universal but depends on the Reynolds number. If we approximate the relation by the linear fit in log-log coordinate, it is C_p ∝ R_λ^<1.3>. We think these results are rally new experimental results.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] Yoshiyuki Tsuji: "Aniso tropy versus Universality in Shear Flow Turbulence"Statistical Theory and Computational Approaches to Turbulence. 138-158 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takahiro Ito, Yoshiyuki Tsuji: "Application of Ultrasonic Velocity Profile Meter to Vortex shedding ・・・・・・"Experiments in Fluids. 31. 324-335 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 辻 義之, 宮地圭, 中村 育雄: "平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性"日本機械学会論文集B偏. 68・667. 785-792 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 辻 義之他3名: "自由界面上のリップル形成に関する実験的研究"日本機械学会論文集B偏. 68・671. 1841-1848 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji et al.: "Invariant Assumption of pdf Profiles in the log-law Region in ・・・・・・"Proce. of Turbulent Shear Flow Phenomena, KTH2002. II. 509-512 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji: "Similarity Scaling and Statistics of Pressure Fluctuation in Turbulence"Proce. IUTAM Symposium, Princeton, 2002. 1-2 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji: "Anisotropy versus Universality in Shear Flow Turbulence, Nagoya University"Proc.of International Workshop ; Statistical theories and computational approaches to turbulence : modern perspectives and application to global scale flows, Nagoya University. Oct.10-13. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki TSUJI, Kenji Takeda and Yutaka Kukita: "Turbulent Flow over the Wind-induced Gravity Waves in Rectangular Duct, Nihon University Tokyo"Proc.of The 8^<th> International Symposium on Flow Modeling and Turbulence Measurements, Nihon University Tokyo. Dec.4-6. 103 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takahiro ITO, Yoshiyuki TSUJI, Hideo NAKAMURA, Yutaka KUKITA: "Application of Ultrasonic Velocity Profile Meter to Vortex Shedding and Empirical Eigenfunctional Analysis"Experiments in Fluids. Vol.31. 324-335 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji, Kei Miyachi, and Ikuo Nakamura: "Invariant Assumption of pdf Profiles in the Log-law Region in Smooth and Rough Wall Turbulent Boundary Layers"Proc.of Turbulence and Shear Flow Phenomena. June 27-29, Vol.II. 509-512 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji, Kei Miyachi, Ikuo Nakamura: "Invariant assumption of PDF profile and universal velocity law in turbulent boundary layers"JSME Journal B. vol.68. 785-792 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji, Kouji Nozawa, Kousuke Seki, and Yutaka Kukita: "Formation of capillary ripples on gravity-capillary waves"JSME Journal B. vol.68. 1841-1848 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji: "Similarity Scaling and Statistics of Pressure Fluctuation in Turbulence"Proceeding of IUTAM symposium, Princeton University. September 11-13. 1-2 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takatoshi Mizuno, Yoshiyuki Tsuji and Yutaka Kukita: "Thermal Turbulence in Mercury at High Rayleigh Numbers (Scaling Form of Oscillating Frequency)"5th JSME-KSME Fluids Engineering Conference Nagaya Japan, CD-ROM publication. Nov.17-21. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji and Kenji Takeda et al., ed.H.Ninokata et al.: ""Turbulent Flow over the Wind-Induced Gravity Waves in Rectangular Duct", Fluid Modeling and Turbulence Measurements"World Scientific. 241-248 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji, ed.Y.Kaneda: ""Anisotropy versus Universality in Shear Flow Turbulence", Statistical Theories and Computational Approaches to Turbulence"Springer. 138-158 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yoshiyuki Tsuji: "Anisotropy versus Universality in Shear Flow Turbulence"Statistical Theories and Computational Approaches to Turbulence. 138-158 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Takahiro Ito, Yoshiyuki Tsuji et al.: "Application of Ultrasonic Velocity Profile Meter to Vortex Sheddeng and......"Experiments in Fluids. 31. 324-335 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] 辻 義之, 宮地 圭, 中村育雄: "平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性"日本機械学会論文集B偏. 68・667. 785-792 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 辻 義之, 他3名: "自由界面上のリップル形成に関する実験的研究"日本機械学会論文集B偏. 68・671. 1841-1848 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yoshiyuki Tsuji et al.: "Invariant Assumption of pdf Profiles in the Log-law Region in Smooth and..."Proceedings of Turbulent Shear Flow Phenomena, KTH 2002. Vol.II. 509-512 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yoshiyuki Tsuji: "Similarity Scaling and Statistics of Pressure Fluctuation in Turbulence"Proceedings of IUTAM Symposium, Princeton University. 1-2 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Ito, Y.Tsuji et al.: "Application of ultrasonic velocity profile meter to vortex"Experiments in Fluids. 31. 324-335 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 辻 義之他2名: "平板乱流境界層対数速度分布領域における変動速度"日本機械学会論文集(B編). 68・667(未定 3月出版). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 辻 義之他3名: "自由界面波上のリップル形成に関する実験的研究"日本機械学会論文集(B編). 68・670(未定 6月出版). (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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