S0502-5-5 デルタ翼におけるプチデルタ前縁からの剥離渦の効果([S0502-5]噴流,後流および剥離流れ現象の解明と制御(5))

概要

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A delta wing with a saw-tooth leading edge has an ability to improve its aerodynamic performance, which was suggested and confirmed by the authors' previous study. It should not be practical, economical and easily controllable, because the saw-tooth configuration part extends from the apex of the delta wing to the trailing edge. In this research a few petit delta parts beside the whole saw-tooth leading edge was suggested on the basis of CFD results for its optimization by changing their location on the leading edge, the number of petit deltas, and the petit delta configuration. The aerodynamic characteristics of the suggested wing were investigated by experimental as well as numerical studies with the comparison to both the base delta wing without a saw-tooth leading edge and the whole saw-tooth delta wing. It was found that a series of three petit deltas with the modified rear configuration, which are located at the middle of the leading edge, gives the best performances at the attack angle for its taking off and landing. The reason for the best lift and such the complicated flow field as the primary leading edge separation vortex interacted with the flow from the petit deltas was examined in detail.
2010-09-04