Test assembly and test device for simulating annular fuel

The invention relates to the technical field of nuclear fuel tests, and particularly provides a test assembly and a test device for simulating annular fuel, and the test assembly comprises a shell, two end plugs, a heating assembly and an air inlet assembly. The shell comprises an inner wrapping shell and an outer wrapping shell which are of hollow tubular structures; the two end plugs are installed at the two ends of the shell in a sealed mode respectively so that an annular sealing cavity can be formed between the outer cladding and the inner cladding. The heating assembly comprises a heating wire which is located in the sealing cavity, spirally surrounds the outer side of the inner cladding and is used for simulating the temperature change working condition of the annular fuel. And the air inlet assembly is suitable for inflating the sealing cavity and is used for simulating the pressure intensity change working condition in the annular fuel. The test device comprises a pressure control system, an alternat