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Лабораторная работа № 2. Лабораторная работа № 3. Определение тяги сверхзвукового сопла. на различных режимах работы



Лабораторная работа № 2

Исследование течения газа по сверхзвуковому соплу:

Цель работы

Ознакомление с расчетом установившихся одномерных изоэнтропических течений газа. Экспериментальное исследование течений газа в сверхзвуковом сопле. Сравнение экспериментального распределения параметров истечения с рассчитаным теоретически.

Описание установки

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

(дать описание основных обозначенных элементов установки).
                                                                                                      

 

                                                                                                      

                                                                                                      

                                                                                                      

Рис. 2. Схема газодинамического стенда

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

Основные расчетные зависимости

, при    

         

                        [      ],

                         [      ],                              [      ],

                        [      ].

Пример расчета

                                                                                                 

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

Результаты опыта          p0=              [      ].

Таблица координат дренажных отверстий

Сечение кр а
Х, мм                        
d, мм                        
F, см2                        
Fкр/F                        
p, кг/см2                        

Результаты расчета

 

 

M

pi/p0

T0

T

а

V

теор. эксп.
    К К м/с м/с кг/с
кр 1, 00 0, 528  

 

     

 

           
           
           
           
           
           
           
           
           
           
а            

 Графическая зависимость

Выводы

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

Лабораторная работа № 3

Определение тяги сверхзвукового сопла

на различных режимах работы

Цель работы

Экспериментально исследовать влияние режима сопла на величину тяги. Оценить пределы применения методики расчета в случае отрыва потока от стенок сопла. Сравнить результаты расчета с экспериментальными данными.

Рис. 3. Измеритель тяги сопла

 

Описание установки

                                                                                                      

(дать описание основных обозначенных элементов установки).
                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                 

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

Порядок проведения работы

                                                                                                      

                                                                                                      

(кратко)
                                                                                                      

                                                                                                      

                                                                                                      

                                                                                                      

Основные расчетные зависимости

Сила тяги при работе сопла на режиме:

расчетном (? )                                    ;

недорасширения и перерасширения без отрыва (? )

                                                           ;

перерасширения с отрывом пограничного слоя (? )

                                                                                               .

Давление перед скачком уплотнения       ,

=                                      =    .

Число Маха перед точкой отрыва (? )

Число Маха за точкой отрыва: .

Давление за скачком уплотнения:

.

Коэффициент тяги сопла: CR=                        .



  

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