ANALYS OF PD-14 AIRCRAFT ENGINE RESISTANCE TO THE VOLCANIC ASH IMPACT
The PD14 type Russian aircraft engine test results when volcanic ash enters its gas-air path are presented for the first time. Tests of PD-14 developed by JSC "UEC-Aviadvigatel" [1] were carried out in the conditions of a closed ground test bench Ts-17T FAA "CIAM named afterP. I. Baranov" in accordance with the requirements of the European Aviation Safety Agency EASA. Natural ash from modern eruptions of the Kamchatka volcano Shiveluch was used as volcanic ash. It is shown that the ash ingress into the PD-14 engine with the maximum permissible concentration in Europe of 4 mg/m3 for one hour does not lead to a change in the traction characteristics of the PD-14 and the occurrence of undesirable consequences. Particular attention is paid to the effect of volcanic ash on the combustion chamber and engine turbine. The data of X-ray spectral analysis of vitreous ash deposits on turbine elements are presented. Numerical calculation of the model area of generation of vitreous deposits of Shiveluch ash in the gas-air path of the PD-14 engine was carried out.