An in-line, six-cylinder, 6.6-liter, four-stroke cycle SI engine with multipoint port fuel injection operates at 3000 RPM, with a volumetric efficiency of The intake manifold runners can be...

An in-line, six-cylinder, 6.6-liter, four-stroke cycle SI engine with multipoint port fuel injection operates at 3000 RPM, with a volumetric efficiency of The intake manifold runners can be approximated as round pipes with an inside diameter of 4.0 cm. Inlet temperature to the manifold is 27°C.

Calculate:

(a) Average velocity and mass flow rate of air to each cylinder, using inlet temperature to evaluate properties. [m/sec, kg/sec]

(b) Reynolds number in the runner to cylinder #1, which is 40 cm long (use standard interior pipe flow equations).

(c) Temperature of the air entering cylinder #1 if the runner wall temperature is constant at 67°C. [°C]

(d) Wall temperature needed for the runner to cylinder #3, such that the cylinder air inlet temperature is the same as that in cylinder #1. Runner length for cylinder #3 is 15 cm. [°C]