Experimental and numerical simulation investigations on particle sampling for high-pressure natural gas

A novel Null-type sampling nozzle with six sampling holes was developed to measure the particle concentrations and size distributions in high-pressure natural gas flows under isokinetic sampling conditions. The isokinetic sampling performances of sampling nozzles were investigated by experiments and numerical simulations with standard κ–ε turbulent model. The maximum deviation between the experimental and numerical data was less than 4%. In order to ensure reliability and stability, sampling nozzles were calibrated in standard wind tunnel. Furthermore, this novel Null-type sampling nozzle was used to measure the separation efficiency of filter with an operation pressure of 6.0 MPa in a natural gas compressor station. The results of experiment and numerical simulation show that the new Null-type sampling nozzles have relatively smaller isokinetic sampling errors and reliable sampling efficiencies, which enable it competent to sample high-pressure natural gas.