Tupolev 154M noise asesment (Анализ шумовых характеристик самолёта Ту-154М)
Информация - Авиация, Астрономия, Космонавтика
Другие материалы по предмету Авиация, Астрономия, Космонавтика
783
2066,667
2nd harmonic freq., Hz10772,5
10390,17
10207,27
9830,1
9625,5
9131,567
4133,333
Using experimental data, we determine lining and cell geometry:
For the first harmonic, parameters will be:
- Distance between linings 28.5 cm;
- Lining length 45 cm;
- Lining depth 2.5 cm;
- Cell length 2 cm..
For the second harmonic, parameters will be the following:
- Distance between linings 4.5 cm;
- Lining length 5 cm;
- Lining depth 2.5 cm;
- Cell length 0.4 cm.
Figure 7.4 shows the placement of the lining in engine nacelle.
Figure 7.4 Lining placement in the nacelle.