aerodc81.h

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/aero/aerodc81.h,v 1.25 2017/01/12 14:45:58 masarati Exp $ */
/* 
 * MBDyn (C) is a multibody analysis code. 
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 * Paolo Mantegazza     <mantegazza@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation (version 2 of the License).
 * 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef AERODC81_H
#define AERODC81_H

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

enum {
        // 0 unused?
        OUTA_ALPHA      = 1,
        OUTA_GAMMA      = 2,
        OUTA_MACH       = 3,
        OUTA_CL         = 4,
        OUTA_CD         = 5,
        OUTA_CM         = 6,
        // 7 unused?
        OUTA_CLALPHA    = 7,
        OUTA_ALF1       = 8,
        OUTA_ALF2       = 9,
        OUTA_DAN        = 10,
        OUTA_DAM        = 11,
        OUTA_DCN        = 12,
        OUTA_DCM        = 13,
        // 14-19 unused?

        OUTA_LAST       = 20
};

typedef struct outa_t {
        doublereal outa_00;
        doublereal alpha;
        doublereal gamma;
        doublereal mach;
        doublereal cl;
        doublereal cd;
        doublereal cm;
        // doublereal outa_07;
        doublereal clalpha;
        doublereal alf1;
        doublereal alf2;
        doublereal dan;
        doublereal dam;
        doublereal dcn;
        doublereal dcm;
        doublereal outa_14;
        doublereal outa_15;
        doublereal outa_16;
        doublereal outa_17;
        doublereal outa_18;
        doublereal outa_19;
} outa_t;

extern const outa_t outa_Zero;

/*
C     DEFINIZIONI VETTORE VAM
C
C VAM(1): densita' dell'aria
C VAM(2): celerita' del suono
C VAM(3): corda
C VAM(4): 1/4 corda
C VAM(5): 3/4 corda
C VAM(6): svergolamento
 */
enum {
        VAM_DENSITY = 0,
        VAM_SOUND_CELERITY,
        VAM_CHORD,
        VAM_FORCE_POSITION,
        VAM_BC_POSITION,
        VAM_TWIST,

        VAM_LAST
};

typedef struct vam_t {
        doublereal density;
        doublereal sound_celerity;
        doublereal chord;
        doublereal force_position;
        doublereal bc_position;
        doublereal twist;
} vam_t;

/* 
 * dati in formato c81;
 * le array mX contengono gli NMX numeri di mach;
 * le array aX contengono gli NMX*NAX coefficienti, 
 * preceduti dall'angolo di incidenza e row-oriented.
 * 
 * Quindi, il numero di Mach j-esimo (a base 0) e'
 * 
 *     mX[j]
 * 
 * l'angolo di incidenza i-esimo (a base 0) e'
 * 
 *     aX[i]
 * 
 * e per avere il coefficiente relativo all'angolo
 * di incidenza i-esimo, al numero di mach j-esimo
 * 
 *     aX[NAX*(j+1)+i]
 *
 * MODIFICA 2000/10/02:
 * angolo di stallo o fine linearita' per correzione flusso trasverso
 *
 * Ora si aggiunge:
 *   - un vettore di angoli ai quali si perde linearita' (+)
 *   - un vettore di angoli ai quali si perde linearita' (-)
 *   - un vettore con il Cp/alpha
 */
typedef struct c81_data {
        char header[31];
   
        int NML;
        int NAL;
        doublereal *ml;
        doublereal *al;

        /*
         * matrice dei dati di stallo:
         *  0 -> NAL-1 :        angoli di stallo positivi
         *  NAL -> 2*NAL-1 :    angoli di stallo negativi
         *  2*NAL -> 3*NAL-1 :  Cp/alpha
         */
        doublereal *stall;
        doublereal *mstall;
   
        int NMD;
        int NAD;
        doublereal *md;
        doublereal *ad;
   
        int NMM;
        int NAM;
        doublereal *mm;
        doublereal *am;
} c81_data;

extern int 
c81_aerod2(doublereal* W, const vam_t *VAM, doublereal* TNG, outa_t* OUTA, c81_data* data);

extern int 
c81_aerod2_u(doublereal* W, const vam_t *VAM, doublereal* TNG, outa_t* OUTA, 
                c81_data* data, long unsteadyflag);

#ifdef __cplusplus
}
#endif /* __cplusplus */
   
#endif /* AERODC81_H */