/* Rör
-----------------*/
function ClearForm(form)
{
}
function ResetForm(form)
{
form.hast.value="";
form.typ.value="";
form.tfall.value="";
}
function compute(form)
{
if (check(form)==false)
{
ResetForm(form);
}
else
{
ResetForm(form)
form.hast.value=Math.round(100*((form.flode.value*21.23)/(form.rord.value*form.rord.value)))/100;
re=form.hast.value*form.rord.value*1000/form.visk.value;
if(re <= 2300)
{
form.typ.value="laminär";
form.tfall.value=Math.round(100*((0.285*form.visk.value*form.langd.value*form.hast.value)/(form.rord.value*form.rord.value)))/100;
}
else
{
form.typ.value="turbulent";
form.tfall.value=Math.round(100*((1.41*form.langd.value*form.hast.value*form.hast.value)/(Math.sqrt(Math.sqrt(re))*form.rord.value)))/100;
}
}
}
function check(form)
{
if (form.flode.value.length==0||form.rord.value.length==0||form.visk.value.length==0||form.langd.value.length==0){
alert("Erforderliga indata saknas!");
return false;
}
else
return true;
}
var now = new Date();
var year = now.getYear();
var month = (((now.getMonth()+1) < 10) ? "0" : "") + (now.getMonth()+1);
var day = ((now.getDate() < 10) ? "0" : "") + now.getDate();
var MonthDayYear =(" "+year+month+day+" ");
function print(form)
{
text=("Utskrift beräkningrör");
text=(text+"Beräkning rör");
text=(text+"");
text=(text+MonthDayYear);
text=(text+"
");
text=(text+"Indata
");
text=(text+"
| Flöde = | "+form.flode.value+" | l/m |
| Inv. rördiameter = | "+form.rord.value+" | mm |
| Viskositet = | "+form.visk.value+" | cst |
| Rörlängd = | "+form.langd.value+" | m |
");
text=(text+"
");
text=(text+"Resultat
");
text=(text+"
| Strömningshast. = | "+form.hast.value+" | m/s |
| Strömningstyp = | "+form.typ.value+" | |
| Tryckfall = | "+form.tfall.value+" | bar |
");
text=(text+"
");
text=(text+"