2. Estimate the following quantities for a diesel fuel spray, with a SOI at 0 de

Question

2. Estimate the following quantities for a diesel fuel spray, with a SOI at 0 degree aTDC, in the CI engine described in Problem 1. The injection pressure is 150 MPa and the injector nozzle hole diameter is 140 mu m. Diesel fuel has a density of about 823 kg/m^3. For this estimate, you can assume that the cylinder pressure and density remain approximately constant during the injection period. Hiroyasu proposes an empirically-derived spray penetration correlation of the form: S[m] = where S is the penetration distance in [m], P inj is the injection pressure, Pamb is the cylinder gas ambient pressure, rho amb is the cylinder gas ambient density, d nozzle is the injector nozzle diameter, and t is time. a) Assuming that the flow through the nozzle orifice is incompressible and quasi- steady, estimate the liquid fuel velocity at the orifice exit. [m/s] b) According to the Hiroyasu penetration correlation, how long would the fuel take to reach the cylinder wall, to the nearest CAD, if the injector is centrally mounted? [CAD] Note: Ensure that the units you employ in Hiroyasu's equation are dimensionally consistent.

Explanation / Answer

too complicated. I am still trying

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.