Question

我正在进行一项关于不同复杂程度层流预混火焰数值分析的项目。我非常需要帮助，因为我是Python和Cantera的新手。我有以下疑问：

我可以修改adiabetic.py模块，该模块主要给出混合物的绝热温度，从入口温度到可以让我从绝热温度作为输入的入口温度吗？

以下是该计划：

"""
Adiabatic flame temperature and equilibrium composition for a fuel/air mixture
as a function of equivalence ratio, including formation of solid carbon.
"""

import cantera as ct
import numpy as np
import sys
import csv

##############################################################################
# Edit these parameters to change the initial temperature, the pressure, and
# the phases in the mixture.

T = 300.0
P = 101325.0

# phases
gas = ct.Solution('gri30.xml')
carbon = ct.Solution('graphite.xml')

# the phases that will be included in the calculation, and their initial moles
mix_phases = [(gas, 1.0), (carbon, 0.0)]

# gaseous fuel species
fuel_species = 'CH4'

# equivalence ratio range
npoints = 50
phi = np.linspace(0.3, 3.5, npoints)

##############################################################################

mix = ct.Mixture(mix_phases)

# create some arrays to hold the data
tad = np.zeros(npoints)
xeq = np.zeros((mix.n_species,npoints))

for i in range(npoints):
    # set the gas state
    gas.set_equivalence_ratio(phi[i], fuel_species, 'O2:1.0, N2:3.76')

    # create a mixture of 1 mole of gas, and 0 moles of solid carbon.
    mix = ct.Mixture(mix_phases)
    mix.T = T
    mix.P = P

    # equilibrate the mixture adiabatically at constant P
    mix.equilibrate('HP', solver='gibbs', max_steps=1000)

    tad[i] = mix.T
    print('At phi = {0:12.4g}, Tad = {1:12.4g}'.format(phi[i], tad[i]))
    xeq[:,i] = mix.species_moles

# write output CSV file for importing into Excel
csv_file = 'adiabatic.csv'
with open(csv_file, 'w') as outfile:
    writer = csv.writer(outfile)
    writer.writerow(['phi','T (K)'] + mix.species_names)
    for i in range(npoints):
        writer.writerow([phi[i], tad[i]] + list(xeq[:,i]))
print('Output written to {0}'.format(csv_file))

if '--plot' in sys.argv:
    import matplotlib.pyplot as plt
    plt.plot(phi, tad)
    plt.xlabel('Equivalence ratio')
    plt.ylabel('Adiabatic flame temperature [K]')
    plt.show()

取自：http://www.cantera.org/docs/sphinx/html/cython/examples/multiphase_adiabatic.html

请问我具体问题，因为即使我不知道具体要问什么。但我知道自己想做什么。

Answer 1

这是一个有趣的问题。

原则上应该不会太困难。假设您已经给出了入口燃料成分，当量比和绝热火焰温度，步骤将是：

将温度设置为绝热火焰温度并将燃料 - 空气混合物平衡设定为T和P.
计算（并保存）混合物平均焓。
将成分设置回入口的成分，然后调整温度，直到混合物平均焓与步骤2中的相同。

如何在CANTERA Python模块中反转程序adiabetic.py，使其输入adiabetic温度并提供输出入口温度？

1 个答案: