Computation of engine pre-entry thrust is required to evaluate aircraft configuration drag. Numerical computation of this quantity requires knowledge of the captured streamtube, which depends on the stagnation line location. A new method that uses the far-field formulation is developed so that knowledge of the streamtube properties is no longer required. Using similar techniques, an alternative method to compute the standard net thrust, the basis of most thrust/drag bookkeeping systems, is introduced. The classical formulation to compute the standard net thrust needs interpolation of flow quantities in the nacelle's exit plane which leads to loss of accuracy. Theoretical development of the far-field method in power-on conditions is presented as well as an overview of the bookkeeping technique in CFD. Simulations are performed with ANSYS Fluent 13.0 on the isolated CFM56 nacelle in power-on conditions with varying boundary conditions. Results of the proposed approaches are in agreement with ESDU and classical formulations. Drag decomposition in terms of viscous, wave, spurious, induced, and through-flow drag is presented. Configuration drag is computed with two formulations which are in agreement.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Engine pre-entry thrust and standard net thrust evaluation based on the far-field method




    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.50 Luftfahrzeugtechnik / 55.60 Raumfahrttechnik



    Engine pre-entry thrust and standard net thrust evaluation based on the far-field method

    Malouin, Benoit / Gariépy, Martin / Trépanier, Jean-Yves et al. | Elsevier | 2015


    Multidirectional thrust engine

    LI XIAOLIANG | European Patent Office | 2021

    Free access

    ENGINE FOR PRODUCING THRUST

    OQAB HAROON B / DIETRICH GEORGE | European Patent Office | 2022

    Free access

    Ion thrust engine development

    Eschner, D.L. | Engineering Index Backfile | 1958


    Thrust-Augmented Maneuvering in Atmospheric Entry

    R. E. Brackeen / P. D. Arthur | NTIS | 1967