ESDU 73006 B-1981
孤立的身体和翼身干扰对侧滑引起的滚转力矩的影响

EFFECTS OF ISOLATED BODY AND WING-BODY INTERFERENCE ON ROLLING MOMENT DUE TO SIDESLIP

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标准号

ESDU 73006 B-1981

发布

1981年

发布单位

ESDU - Engineering Sciences Data Unit

当前最新

ESDU 73006 B-1981

 

 

适用范围

INTRODUCTION The data given in this Item provide a means of estimating the effect on the rolling moment derivative due to sideslip@ Lv@ of adding a body to a gross wing. The data apply to low speeds and to lift coefficients for which the flow over the wing-body combination remains fully attached (see Item No. 66033 for wings with symmetrical sections). The gross wing contribution@(Lv)w @ may be obtained from Item Nos Aero A.06.01.03@ Aero A.06.01.09 and 80033. The fin and rudder contribution Lvto may be obtained from Item No. 70006. Information on the effect on Lvof mounting jet-engine nacelles on the aft portion of the body or below the wing is given in Addendum A of this Item. Wind-tunnel tests show that when a wing and body are in combination the total value of@ Lvi.e. (Lv)w+b@ is not equal to the sum of the contributions arising from the gross wing and body when tested in isolation@ thus demonstrating the presence of interference effects between the wing and body. In the linear lift range these interference effects are primarily due to the vertical position of the wing with respect to the body although there is some evidence to suggest that there can be secondary effects which are lift-dependent@ arising from the longitudinal position of the wing relative to the body. The interference arising from the vertical position of the wing with respect to the body@ (Lv)h@ is caused by changes in the local wing incidence induced by the cross-flow around the body. Theoretical treatments of this effect are given in Derivations 5 and 9@ and methods from these two Derivations are used herein. The isolated body contribution@ (Lv)b@ is usually small compared with the isolated wing and fin and rudder contributions.

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