第8回
円管内オリフィス背後の物質輸送現象に関する研究 -シュミット数の影響-
著者:
佐藤 祐紀,Yuki SATO,山縣 貴幸,Takayuki YAMAGATA,伊藤 晃宏,Akihiro ITO,藤澤 延行,Nobuyuki FUJISAWA,高野 剛,Tsuyoshi TAKANO
発刊日:
公開日:
キーワードタグ:
In this paper, experimental and numerical studies are carried out to understand the pipe-wall thinning caused by the flow accelerated corrosion behind an orifice in a circular pipe. The measurement of mass transfer coefficient is carrie d out using a wall material of benzoic acid in a water flow, which allows the measurement of mass transfer behind the orifice in a circular pipe at Schmidt number 300 and 700, which is comparatively close to the actual condition in the prototype pipeline of nuclear power pl...
英字タイトル:
Study on Mass Transfer Phenomenon behind an Orifice in a Circular Pipe - Effect of Schmidt Number -
論文
流動加速腐食による配管減肉に関する研究 (旋回流とオリフィス偏心の組み合わせ効果による物質輸送現象)
著者:
高野 剛,Tsuyoshi TAKANO,山縣 貴幸,Takayuki YAMAGATA,伊藤 嘉人,Yoshito ITO,藤澤 延行,Nobuyuki FUJISAWA
発刊日:
公開日:
キーワードタグ:
In this paper, pipe-wall thinning phenomenon behind an orifice in a circular pipe is studied by measuring the mass transfer coefficient along the pipe wall by naphthalene sublimation method. An attention is placed on the asymmetrical pipe-wall thinning phenomenon behind an orifice under the influence of swirling flow and allowable orifice bias. The present measurement indicates that the mass transfer coefficient becomes asymmetric about the pipe axis behind the orifice in certain combinations of swirl...
英字タイトル:
Investigation on Pipe-wall Thinning by Flow-accelerated Corrosion (Mass Transfer Phenomenon by Combined Effect of Swirling Flow and Orifice Bias)
論文
液滴衝撃エロージョンに関する研究 (高速噴霧流による減肉特性の評価)
著者:
濱 大地,Daichi HAMA,山縣 貴幸,Takayuki YAMAGATA,高野 剛,Tsuyoshi TAKANO,藤澤 延行,Nobuyuki FUJISAWA
発刊日:
公開日:
キーワードタグ:
The liquid droplet impinging erosion has been a topic of interests related to the maintenance of highly-aged nuclear power plant. However, there exists very few erosion data for small liquid droplets having an order of tens of micrometer in diameter, which is often encountered in prototype pipelines for nuclear power plant. In the present paper, the liquid droplet impinging erosion is investigated by high-speed spray to study the erosion rate of aluminum material with respect to droplet parameters, su...
英字タイトル:
Investigation on Liquid Droplet Impinging Erosion (Evaluation of erosion rate by high-speed spray)
第8回
高速噴霧流による液滴衝撃エロージョンに関する研究(減肉速度の評価と速度依存性)
著者:
林 貫人,Kanto HAYASHI,濱 大地,Daichi HAMA,山縣 貴幸,Takayuki YAMAGATA,高野 剛,Tsuyoshi TAKAMO,藤澤 延行,Nobuyuki FUJISAWA
発刊日:
公開日:
キーワードタグ:
The erosion rate of aluminum material by liquid droplet impingement erosion is studied by using high speed spray. In order to propose an accurate prediction method, a new experimental data are obtained by using the spray erosion larger than the scale of specimen, which allo ws a constant erosion rate, while it is not for the previous method. The new experimental data shows that the erosion rate is proportiona l to the power of 7 of the droplet velocity, which results in a highly accurate prediction method...
英字タイトル:
Investigation on Liquid Droplet Impinging Erosion by High-Speed Spray(Evaluation of Erosion Rate and Its Velocity Dependency)