301 wiersze
8.8 KiB
Plaintext
301 wiersze
8.8 KiB
Plaintext
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"source": [
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"## Hot air balloon - lift calculator\n",
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"### Box shape\n"
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]
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"cell_type": "code",
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},
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"outputs": [],
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"source": [
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"# https://pythreejs.readthedocs.io\n",
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"from pythreejs import *\n",
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"from IPython.display import HTML,display\n",
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"from math import pi\n",
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"\n",
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"# https://ipywidgets.readthedocs.io\n",
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"import ipywidgets as widgets\n",
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"from ipywidgets import Layout\n",
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"\n",
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"# https://pypi.org/project/termcolor/\n",
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"from termcolor import colored\n",
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"\n",
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"#from scipy.interpolate import interp1d\n",
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"#import numpy as np"
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]
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{
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"cell_type": "code",
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"execution_count": 87,
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"id": "d075a994-76bb-46f7-bdfb-cc6ef449dc43",
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"metadata": {
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}
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},
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"outputs": [],
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"source": [
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"# air density–temperature relationship at 1 atm or 101.325 kPa\n",
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"# https://en.wikipedia.org/wiki/Density_of_air\n",
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"# https://www.engineersedge.com/calculators/air-density.htm\n",
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"# temp in st.C density in g/m3\n",
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"\n",
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"#temp = [-25,-20,-15,-10,-5,0,5,10,15,20,25,30,35]\n",
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"#dens = [1422.4,1394.3,1367.3,1341.3,1316.3,1292.2,1269.0,1246.6,1225.0,1204.1,1183.9,1164.4,1145.5]\n",
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"#dens_temp_func = interp1d(temp, dens)\n",
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"\n",
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"\n",
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"def airDensity(temp=0.0):\n",
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" tempK = temp + 273.0 # absolute temperature [K]\n",
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" p = 101325.0 # pressure [Pa]\n",
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" rSpec = 287.0500676 # specific gas constant for dry air [J⋅kg−1⋅K−1]\n",
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" return 1000.0 * p / ( rSpec * tempK )"
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]
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"tags": []
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"data": {
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"model_id": "1501ab1298aa43a4b5d45c8f4fd3a186",
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"text/plain": [
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"interactive(children=(FloatSlider(value=2.0, description='Width [m]:', layout=Layout(width='500px'), max=5.0, …"
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]
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"metadata": {},
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"output_type": "display_data"
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"source": [
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"def f(width,height,depth,airTemp,hotAirTemp,coatDens):\n",
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" print(\"\\n\")\n",
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"# Volume\n",
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" volume = width * height * depth\n",
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" print( \"Volume: {:.2f} [m3]\".format(volume)) \n",
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"# Area\n",
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" area = 2 * (width * height + width * depth + height * depth)\n",
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" print( \"Area: {:.2f} [m2]\".format(area)) \n",
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"# Coating density 300g / 4x5m = 15g/m2\n",
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"# coatingDensity = 15.0\n",
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"# print( \"Coating density: {:.2f} [g/m2]\".format(coatingDensity)) \n",
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" coatingWeight = coatDens * area\n",
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" print( \"Coating weight: {:.2f} [g]\".format(coatingWeight)) \n",
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"# Lift per volume g/m3 \n",
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"# airDens = dens_temp_func( airTemp )\n",
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"# hotAirDens = dens_temp_func( hotAirTemp ) \n",
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" airDens = airDensity( airTemp )\n",
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" hotAirDens = airDensity( hotAirTemp ) \n",
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" lift = airDens - hotAirDens\n",
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" print( \"Lift: {:.2f} [g/m3]\".format(lift)) \n",
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"# Total lift force lift * volume \n",
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" totalLiftForce = lift * volume\n",
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" print( \"Total lift force: {:.2f} [g]\".format(totalLiftForce)) \n",
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"# Free lift force totalLiftForce - coatingWeight \n",
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" freeLiftForce = totalLiftForce - coatingWeight\n",
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" if freeLiftForce < 0:\n",
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" color = 'red'\n",
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" else:\n",
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" color = None\n",
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" print( \"Free lift force:\", colored(\"{:.2f} [g]\".format(freeLiftForce),color)) \n",
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" print(\"\\n\")\n",
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"\n",
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" box = Mesh(geometry=BoxBufferGeometry(\n",
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" width=width, \n",
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" height=height, \n",
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" depth=depth,\n",
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" widthSegments=5, \n",
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" heightSegments=10,\n",
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" depthSegments=15),\n",
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" material=MeshLambertMaterial(color='gray')\n",
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" )\n",
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" keyLight = DirectionalLight(color='white', position=[3, 5, 1], intensity=0.5)\n",
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"\n",
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" c = PerspectiveCamera(position=[2, 2, 5], up=[0, 1, 0], children=[keyLight])\n",
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"\n",
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" scene = Scene(children=[box, c, AmbientLight(color='#777777')], background=None)\n",
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"\n",
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" renderer = Renderer(camera=c,\n",
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" scene=scene,\n",
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" alpha=True,\n",
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" clearOpacity=1.0,\n",
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" clearColor='#62a0ea',\n",
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" controls=[OrbitControls(controlling=c)])\n",
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" return renderer\n",
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"\n",
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"#display(HTML('''<style>\n",
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"# .widget-label { min-width: 25ex !important; }\n",
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"#</style>'''))\n",
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"\n",
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"layout=Layout(width='500px')\n",
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"style = {'description_width': 'initial'}\n",
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" \n",
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"widgets.interact(f, \n",
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" width=widgets.FloatSlider(min=0.1, max=5.0, step=0.1, value=2.0, description='Width [m]:',readout_format='.1f',layout=layout,style=style), \n",
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" height=widgets.FloatSlider(min=0.1, max=5.0, step=0.1, value=2.0, description='Height [m]:',readout_format='.1f',layout=layout,style=style), \n",
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" depth=widgets.FloatSlider(min=0.1, max=5.0, step=0.1, value=2.0, description='Depth [m]:',readout_format='.1f',layout=layout,style=style),\n",
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" airTemp=widgets.FloatSlider(min=-40, max=35, step=1.0, value=10.0, description='Air temp.[°C]:',readout_format='.0f',layout=layout,style=style), \n",
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" hotAirTemp=widgets.FloatSlider(min=-40, max=55, step=1.0, value=35.0, description='Hot air temp.[°C]:',readout_format='.0f',layout=layout,style=style),\n",
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" coatDens=widgets.FloatSlider(min=1, max=50, step=1.0, value=15.0, description='Coating density [g/m2]:',readout_format='.0f',layout=layout,style=style) \n",
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" );\n"
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]
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