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package main
import (
"fmt"
g "github.com/AllenDang/giu"
"image"
"image/draw"
_ "image/jpeg"
"os"
)
const (
gasConstant = 8.314472
airMolarMass = 0.0289647 // kg/mol
)
// Number of data points on the compressor map.
var numPoints = 1
var (
displacement = 2000 * CubicCentimetre
volumeUnitIndex int32
// Angular crankshaft speed in RPM.
speed = []int32{2000}
volumetricEfficiency = []int32{80}
intakeAirTemperature = []Temperature{{25, Celcius}}
temperatureUnitIndex int32
manifoldPressure = []Pressure{AtmosphericPressure()}
pressureUnitIndex int32
)
var pressureRatio []float32
func pressureRatioAt(point int) float32 {
u := Pascal
m := manifoldPressure[point] / u
a := AtmosphericPressure() / u
return float32(m / a)
}
func init() {
pressureRatio = append(pressureRatio, pressureRatioAt(0))
}
var (
massFlowRateAir []MassFlowRate
massFlowRateUnitIndex int32
)
func massFlowRateAt(point int) MassFlowRate {
rpm := float32(speed[point])
disp := float32(displacement / CubicMetre)
ve := float32(volumetricEfficiency[point]) / 100.0
cubicMetresPerMin := (rpm / 2.0) * disp * ve
iat, err := intakeAirTemperature[point].AsUnit(Kelvin)
Check(err)
pres := manifoldPressure[point] / Pascal
molsPerMin := (float32(pres) * cubicMetresPerMin) / (gasConstant * iat)
kgPerMin := molsPerMin * airMolarMass
mfr := MassFlowRate(kgPerMin/60.0) * KilogramsPerSecond
return mfr
}
func init() {
massFlowRateAir = append(massFlowRateAir, massFlowRateAt(0))
}
var (
compressorImage *image.RGBA
compressorTexture *g.Texture
selectedCompressor Compressor
)
func init() {
manufacturer := "garrett"
series := "g"
model := "25-660"
c, ok := Compressors[manufacturer][series][model]
if !ok {
fmt.Printf("compressor.Compressors()[\"%s\"][\"%s\"][\"%s\"] does not exist.\n",
manufacturer, series, model,
)
os.Exit(1)
}
setCompressor(c)
}
func main() {
wnd := g.NewMasterWindow("volute", 400, 200, 0)
go updateCompImg()
m := <-updatedCompImg
g.EnqueueNewTextureFromRgba(m, func(tex *g.Texture) {
compressorTexture = tex
})
wnd.Run(loop)
}
func setCompressor(c Compressor) {
f, err := os.Open(c.FileName)
Check(err)
defer f.Close()
j, _, err := image.Decode(f)
Check(err)
b := j.Bounds()
m := image.NewRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
draw.Draw(m, m.Bounds(), j, b.Min, draw.Src)
selectedCompressor = c
compressorImage = m
go updateCompImg()
}
func loop() {
g.SingleWindow().Layout(
displacementRow(),
g.Table().
Size(g.Auto, 190).
Rows(
speedRow(),
volumetricEfficiencyRow(),
intakeAirTemperatureRow(),
manifoldPressureRow(),
pressureRatioRow(),
massFlowRateRow(),
duplicateDeleteRow(),
).
Columns(
columns()...,
).
Flags(g.TableFlagsSizingFixedFit),
selectCompressor(),
g.Custom(compressorWidget),
)
}
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