From 51da21c0d0c58179be517db8a0ed3c58c6cf73dd Mon Sep 17 00:00:00 2001 From: sp9unb Date: Sat, 8 Oct 2022 23:59:16 +0200 Subject: [PATCH] Hot-air balloon --- notebooks/hotair.ipynb | 300 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 300 insertions(+) create mode 100644 notebooks/hotair.ipynb diff --git a/notebooks/hotair.ipynb b/notebooks/hotair.ipynb new file mode 100644 index 0000000..466d2f4 --- /dev/null +++ b/notebooks/hotair.ipynb @@ -0,0 +1,300 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "id": "07f8c98b-84ac-4365-a15b-7521e8e0a281", + "metadata": { + "extensions": { + "jupyter_dashboards": { + "activeView": "grid_default", + "views": { + "grid_default": { + "col": 0, + "height": 1, + "hidden": false, + "row": 0, + "width": 1 + } + } + } + } + }, + "source": [ + "## Hot air balloon (box shape)\n", + "### Lift calculator\n" + ] + }, + { + "cell_type": "code", + "execution_count": 86, + "id": "6ea87a15-f571-4611-8487-5b7556e2ef45", + "metadata": { + "extensions": { + "jupyter_dashboards": { + "activeView": "grid_default", + "views": { + "grid_default": { + "col": null, + "height": 2, + "hidden": true, + "row": null, + "width": 2 + } + } + } + } + }, + "outputs": [], + "source": [ + "# https://pythreejs.readthedocs.io\n", + "from pythreejs import *\n", + "from IPython.display import HTML,display\n", + "from math import pi\n", + "\n", + "# https://ipywidgets.readthedocs.io\n", + "import ipywidgets as widgets\n", + "from ipywidgets import Layout\n", + "\n", + "# https://pypi.org/project/termcolor/\n", + "from termcolor import colored\n", + "\n", + "#from scipy.interpolate import interp1d\n", + "#import numpy as np" + ] + }, + { + "cell_type": "code", + "execution_count": 87, + "id": "d075a994-76bb-46f7-bdfb-cc6ef449dc43", + "metadata": { + "extensions": { + "jupyter_dashboards": { + "activeView": "grid_default", + "views": { + "grid_default": { + "col": null, + "height": 2, + "hidden": true, + "row": null, + "width": 2 + } + } + } + } + }, + "outputs": [], + "source": [ + "# air density–temperature relationship at 1 atm or 101.325 kPa\n", + "# https://en.wikipedia.org/wiki/Density_of_air\n", + "# https://www.engineersedge.com/calculators/air-density.htm\n", + "# temp in st.C density in g/m3\n", + "\n", + "#temp = [-25,-20,-15,-10,-5,0,5,10,15,20,25,30,35]\n", + "#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", + "#dens_temp_func = interp1d(temp, dens)\n", + "\n", + "\n", + "def airDensity(temp=0.0):\n", + " tempK = temp + 273.0 # absolute temperature [K]\n", + " p = 101325.0 # pressure [Pa]\n", + " rSpec = 287.0500676 # specific gas constant for dry air [J⋅kg−1⋅K−1]\n", + " return 1000.0 * p / ( rSpec * tempK )" + ] + }, + { + "cell_type": "code", + "execution_count": 98, + "id": "9a4bbc2b-810d-40ef-8189-9efb64b6df6b", + "metadata": { + "extensions": { + "jupyter_dashboards": { + "activeView": "grid_default", + "views": { + "grid_default": { + "col": null, + "height": 2, + "hidden": true, + "row": null, + "width": 2 + } + } + } + }, + "tags": [] + }, + "outputs": [ + { + "data": { + "application/vnd.jupyter.widget-view+json": { + "model_id": "1501ab1298aa43a4b5d45c8f4fd3a186", + "version_major": 2, + "version_minor": 0 + }, + "text/plain": [ + "interactive(children=(FloatSlider(value=2.0, description='Width [m]:', layout=Layout(width='500px'), max=5.0, …" + ] + }, + "metadata": {}, + "output_type": "display_data" + } + ], + "source": [ + "def f(width,height,depth,airTemp,hotAirTemp,coatDens):\n", + " print(\"\\n\")\n", + "# Volume\n", + " volume = width * height * depth\n", + " print( \"Volume: {:.2f} [m3]\".format(volume)) \n", + "# Area\n", + " area = 2 * (width * height + width * depth + height * depth)\n", + " print( \"Area: {:.2f} [m2]\".format(area)) \n", + "# Coating density 300g / 4x5m = 15g/m2\n", + "# coatingDensity = 15.0\n", + "# print( \"Coating density: {:.2f} [g/m2]\".format(coatingDensity)) \n", + " coatingWeight = coatDens * area\n", + " print( \"Coating weight: {:.2f} [g]\".format(coatingWeight)) \n", + "# Lift per volume g/m3 \n", + "# airDens = dens_temp_func( airTemp )\n", + "# hotAirDens = dens_temp_func( hotAirTemp ) \n", + " airDens = airDensity( airTemp )\n", + " hotAirDens = airDensity( hotAirTemp ) \n", + " lift = airDens - hotAirDens\n", + " print( \"Lift: {:.2f} [g/m3]\".format(lift)) \n", + "# Total lift force lift * volume \n", + " totalLiftForce = lift * volume\n", + " print( \"Total lift force: {:.2f} [g]\".format(totalLiftForce)) \n", + "# Free lift force totalLiftForce - coatingWeight \n", + " freeLiftForce = totalLiftForce - coatingWeight\n", + " if freeLiftForce < 0:\n", + " color = 'red'\n", + " else:\n", + " color = None\n", + " print( \"Free lift force:\", colored(\"{:.2f} [g]\".format(freeLiftForce),color)) \n", + " print(\"\\n\")\n", + "\n", + " box = Mesh(geometry=BoxBufferGeometry(\n", + " width=width, \n", + " height=height, \n", + " depth=depth,\n", + " widthSegments=5, \n", + " heightSegments=10,\n", + " depthSegments=15),\n", + " material=MeshLambertMaterial(color='gray')\n", + " )\n", + " keyLight = DirectionalLight(color='white', position=[3, 5, 1], intensity=0.5)\n", + "\n", + " c = PerspectiveCamera(position=[2, 2, 5], up=[0, 1, 0], children=[keyLight])\n", + "\n", + " scene = Scene(children=[box, c, AmbientLight(color='#777777')], background=None)\n", + "\n", + " renderer = Renderer(camera=c,\n", + " scene=scene,\n", + " alpha=True,\n", + " clearOpacity=1.0,\n", + " clearColor='#62a0ea',\n", + " controls=[OrbitControls(controlling=c)])\n", + " return renderer\n", + "\n", + "#display(HTML(''''''))\n", + "\n", + "layout=Layout(width='500px')\n", + "style = {'description_width': 'initial'}\n", + " \n", + "widgets.interact(f, \n", + " 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", + " 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", + " 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", + " 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", + " 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", + " 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", + " );\n" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "74ed5886-bf61-4e41-8482-bf8ba34faba6", + "metadata": { + "extensions": { + "jupyter_dashboards": { + "activeView": "grid_default", + "views": { + "grid_default": { + "col": null, + "height": 2, + "hidden": true, + "row": null, + "width": 2 + } + } + } + }, + "tags": [] + }, + "outputs": [], + "source": [ + "\n" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "2f3b63fd-d5ea-40b6-a2f9-b31c84cfef36", + "metadata": { + "extensions": { + "jupyter_dashboards": { + "activeView": "grid_default", + "views": { + "grid_default": { + "col": null, + "height": 2, + "hidden": true, + "row": null, + "width": 2 + } + } + } + } + }, + "outputs": [], + "source": [] + } + ], + "metadata": { + "extensions": { + "jupyter_dashboards": { + "activeView": "grid_default", + "version": 1, + "views": { + "grid_default": { + "cellMargin": 2, + "defaultCellHeight": 60, + "maxColumns": 12, + "name": "grid", + "type": "grid" + } + } + } + }, + "kernelspec": { + "display_name": "Python 3 (ipykernel)", + "language": "python", + "name": "python3" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 3 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython3", + "version": "3.9.2" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +}