TY - JOUR
T1 - Attempt to induce the three-dimensionalization process of T-S waves in boundary-layer transition
AU - Kato, Takuma
AU - Fukunishi, Yu
AU - Kobayashi, Ryoji
PY - 1997
Y1 - 1997
N2 - The receptivity of a three-dimensional roughness element on a flat-plate boundary layer to outer acoustic disturbances is investigated by wind-tunnel experiments. The term `receptivity' describes the process through which external disturbances are transformed into instability waves in a boundary-layer. It is known that several types of oblique waves can be found in a three-dimensionalization process in the later stages of boundary-layer transition. In the present experiment, we investigate the behavior of oblique waves and try to control boundary-layer transition by utilizing receptivity. It is shown that oblique waves can be generated on a flat-plate boundary layer with an inclined roughness element under acoustic forcing. An attempt to induce three-dimensionalization modes which are shown in the later stages of boundary-layer transition is carried out. However, flow structure generated by our method did not match the natural three-dimensional modes.
AB - The receptivity of a three-dimensional roughness element on a flat-plate boundary layer to outer acoustic disturbances is investigated by wind-tunnel experiments. The term `receptivity' describes the process through which external disturbances are transformed into instability waves in a boundary-layer. It is known that several types of oblique waves can be found in a three-dimensionalization process in the later stages of boundary-layer transition. In the present experiment, we investigate the behavior of oblique waves and try to control boundary-layer transition by utilizing receptivity. It is shown that oblique waves can be generated on a flat-plate boundary layer with an inclined roughness element under acoustic forcing. An attempt to induce three-dimensionalization modes which are shown in the later stages of boundary-layer transition is carried out. However, flow structure generated by our method did not match the natural three-dimensional modes.
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U2 - 10.1299/kikaib.63.864
DO - 10.1299/kikaib.63.864
M3 - Article
AN - SCOPUS:0031094320
VL - 63
SP - 864
EP - 870
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 607
ER -