Transonic and ultrasonic total static pressure probe measurement truth value calculation method

The invention discloses a transonic and ultrasonic total static pressure probe measurement truth value calculation method, and belongs to the field of engine jet pipe pneumatic testing. Solving is performed by using an iterative method by utilizing the known wind tunnel calibration data so that the known data are acquired firstly: the actually measured total pressure P' of a probe in the test, and then solving is performed by using the iterative method. The real total pressure P of the probe in the test is set to be known, and the total pressure recovery coefficient sigma of the probe in the wind tunnel is solved through sigma =P' /P ; and the real flow Mach number Ma' of the probe in the test can be obtained by the relationship of Ma and sigma , the real static pressure P of the probe in the test can be obtained by the corresponding relational expression P =P .(1+(k-1)/2.Ma ) of Ma and sigma , and similarly the static pressure recovery coefficient sigma of the probe in the test can be obtained by the relationship of Ma and P so that the actually measured static pressure P' of the probe in the next test can be obtained by P =P . sigma . When | P - P | is the real total pressure of the probe in the test, and P is the real static pressure of the probe in the test. When | P - P |>delta, iterative calculation is repeated until the required calculation accuracy delta is achieved. The calculation method is reasonable in logic, high in calculation accuracy, high in efficiency and great in practicality and has high practical value.