// Air Curtains  

function AirCurtain(q, alpha, b, H){
	this.q = q; // air volume per meter port width (m3/s)
	this.alpha = alpha; // air inlet angle
	this.b = b; // inlet width (m)
	this.H = H; // height of port (m)
}


// returns differential pressure
AirCurtain.prototype.dp = function(){
	var dp = 2.2 * Math.pow(this.q,2) * Math.sin(this.alpha * Math.PI / 180) / (this.b * Math.pow(this.H, 3/4))
	return dp;
}

// returns air velocity
AirCurtain.prototype.v = function(){
	var v = this.q / this.b;
	return v;
}

// returns input values
AirCurtain.prototype.inputString = function(){
	return (this.q + " - " + this.alpha + " - " + this.b + " - " + this.H);
}


// Copyright engineeringtoolbox.com