定容燃焼装置によるディーゼル機関の燃焼に関する研究

(第2報燃焼過程を示す各種の経過時間, とくに火災発生遅れについて)

抄録

This paper presents some experimental results of the required time concerning to the combustion processes in diesel engines such as the illumination delay and the ignition delay. The experiments were carried out using a constant volume combustion chamber in the range of the initial pressure ρ_o up to 73 kgf/cm², the initial temperature T_o up to 806K and the oxygen concentration φ up to 1.0.
So called“ignition delay”is classified into heat release delay, illumination delay τ_i, pressure rise delay and ignition delay τ_id .In the range of higher initial temperature, the empirical relationships between the delays (τ_i, τ_id), and initial pressure ρ_o, initial temperature T_o and oxygen concentration φ can be presented the following form:
τ_i=Apⁿ₀∅exp(B/T₀), τ_id=A′p^n′₀∅^c′exp(B/T₀).
In the range of ρ_o above 40 kgf/cm², it is remarkable that ρ_o has no influence on τ_i and τ_id, that is, n and n' are almost zero.