minor restructuring

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Marcel Christian Frommelt 2021-05-03 17:40:35 +09:00
parent e29996bcf5
commit 2317c2907c

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@ -1,35 +1,71 @@
# BALLOON
m_pl = 1728 # payload mass in [kg] herumspielen
m_film = 1897 # mass balloon film in [kg]
m_gas = 600 # lifting gas mass in [kg] herumspielen
V_design = 1120497.6 # maximum fillable balloon volume in [m^3]
L_goreDesign = 1.914 * V_design ** (1/3)
from input.natural_constants import *
# THERMO-OPTICAL
alpha_VIS = 0.024
r_VIS = 0.06
tau_VIS = 0.916
epsilon = 0.1
alpha_IR = 0.1
tau_IR = 0.86
r_IR = 0.04
c_f = 2092 # [J/(kg*K)]
epsilon_ground = 0.9
Albedo = 0.1
T_ground = 288.15
# DRAG
#c_d = 0.47 # drag coefficient balloon (spherical) [-]
# BALLOON DATA
m_pl = 917 #2174 # payload mass in [kg] (incl. flight-chain)
m_bal_init = 540 #500 # initial ballast mass in [kg]
m_film = 0.74074232733 * 1838 # mass balloon film in [kg]
FreeLift = 10 # (initial) free lift in [%]
c_virt = 0.37
# SIMULATION
t_end = 100000 #7500 #5000 # maximum simulation time in [s]
dt = 1.0 #0.01 #0.01 # simulation time step in [s]
start_height = 365.10 # start altitude in [m]
start_lat = 67.889235 # start latitude in [deg]
start_lon = 21.082948 # start longitude in [deg]
start_utc = '2016-07-12 03:17:24.000' # start date and time in UTC
p_0 = 101325 # sea-level pressure in [Pa]
start_height = 384.9 # start altitude in [m]
start_lat = 67.887382 # start latitude in [deg]
start_lon = 21.081452 # start longitude in [deg]
start_utc_old = '2016-07-12 03:17:24.000' # start date and time in UTC
start_utc = '2019-06-19 03:17:24.000' # start date and time in UTC
# possible start dates: between May 22 and June 22
simple = True
# ONLY IN CASE OF APPLICATION OF SIMPLE MODEL:
epsilon_ground = 0.95 # ground emissivity
T_ground = 288.15 # ground temperature
Albedo = 0.3 # total albedo
##cc = 0.1 # cloud cover
m_gas_init = ((m_pl + m_film + m_bal_init) * (FreeLift/100 + 1))/(R_gas/R_air - 1) # lifting gas mass in [kg]
print("initial gas mass:")
print(m_gas_init)
#GROSSER BALLON
#V_design = 1120497.6 # maximum fillable balloon volume in [m^3]
#L_goreDesign = 1.914 * V_design ** (1/3)
#c_ducts = 0.62
#c_valve = 0.77 # estimated
#A_ducts = 76.54 # estimated
#A_valve = 0.140
#t_open = 20 # time it takes to open vents in [s]
#t_close = 20 # time it takes to open vents in [s]
#m_baldot = m_bal_init/1375 # ballast mass drop rate in [kg/s]
# kleiner Ballon
V_design = 834497.469 # maximum fillable balloon volume in [m^3]
L_goreDesign = 1.914 * V_design ** (1/3)
c_ducts = 0.62
c_valve = 0.72 # estimated
A_ducts = 55.743 # estimated
A_valve = 0.1297
t_open = 20 # time it takes to open vents in [s]
t_close = 20 # time it takes to open vents in [s]
m_baldot = m_bal_init/1375 # ballast mass drop rate in [kg/s]
# THERMO-OPTICAL
alpha_VIS = 0.024
r_VIS = 0.060
tau_VIS = 0.916
epsilon = 0.100
alpha_IR = 0.100
tau_IR = 0.860
r_IR = 0.040
c_f = 2092 # [J/(kg*K)] specific heat balloon film
# DRAG
# c_d = 0.47 # drag coefficient balloon (spherical) [-]